Curated list · Water Bottles
Ultralight water bottles
We compared 15 bottles that meet these criteria. The lightest is the Platypus SoftBottle™ at 0.1 lb, and prices start at $13.99.
By Everyday LoadoutData checked 15 bottles comparedHow we compare
At a glance
Side-by-side specs
| Bottle | Capacity | Material | Diameter | Insulated | From |
|---|---|---|---|---|---|
| Platypus SoftBottle™ | 1 L | TPU | — | — | $14.95 |
| HydraPak Mountain Stow™ 350ml | 350 mL | TPU | — | — | $14.40 |
| HydraPak Stow™ 350ml | 350 mL | TPU | — | — | $18 |
| Platypus Platy® 2.0L Bottle | 2 L | TPU | — | — | $19.95 |
| HydraPak Protect Our Winters Stow™ 500ml | 500 mL | TPU | — | — | $21 |
| HydraPak SoftFlask™ Speed 500ml | 500 mL | TPU | — | — | $22 |
| HydraPak Stow™ 1L | 1 L | TPU | — | — | $17.60 |
| Vapur .7L (23 oz) Collapsible Anti-Bottle | 700 mL | — | — | — | $13.99 |
| Vapur 1.5L (50 oz) Collapsible Anti-Bottle | 1.5 L | — | — | — | $17.99 |
| Vapur 1L (34 oz ) Collapsible Anti-Bottle | 1 L | — | — | — | $15.99 |
| Evolved Supply Co. Evolved ThruBottle 1000 | 1 L | Polyethylene | — | — | $16 |
| Igneous NOBO Bottle | 1 L | Polyethylene | 81 mm | — | $18.99 |
| CNOC Outdoors TKO 1L Vesica Collapsible Bottle | 1 L | TPU | — | — | $18.99 |
| Katadyn BeFree | 1 L | TPU | — | — | $52.95 |
| Nalgene 48oz Wide Mouth Ultralite Bottle | 1.42 L | Polyethylene | 89 mm | — | $13.99 |
Platypus SoftBottle™
Lightest
Image not availableThe Platypus SoftBottle™ is a 1 L (34 fl oz) collapsible tpu water bottle that weighs 29 g. Its body is tpu (soft film) and it ships with a screw cap.
It's the lightest of the 15 bottles here, 106 g lighter than the heaviest. Worth knowing: sold by one retailer we track (Platypus store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 29 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Screw cap
$14.95at Platypus store, Logo
Check price for the Platypus SoftBottle™ at Platypus store (opens in new tab)Full specs and sources for the Platypus SoftBottle™Lowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 29 g per liter
- Collapses when empty
- Dishwasher safe
- BPA-free
Worth knowing
- Sold by one retailer we track (Platypus store)
Image not availableThe HydraPak Mountain Stow™ 350ml is a 350 mL (12 fl oz) collapsible tpu water bottle that weighs 35 g. Its body is tpu (soft film), it ships with a flip-top lid and its opening is 28 mm.
It's the second lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (HydraPak store).
- Capacity
- 350 mL (12 fl oz)
- Weight
- 0.1 lb · 35 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Flip-top lid
$14.40was $18at HydraPak store, Sutro
Lowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 100 g per liter
- Collapses when empty
- Fits squeeze filters
- Leakproof
- BPA-free
Worth knowing
- Sold by one retailer we track (HydraPak store)
Image not availableThe HydraPak Stow™ 350ml is a 350 mL (12 fl oz) collapsible tpu water bottle that weighs 35 g. Its body is tpu (soft film), it ships with a flip-top lid and its opening is 28 mm.
It's the third lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (HydraPak store).
- Capacity
- 350 mL (12 fl oz)
- Weight
- 0.1 lb · 35 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Flip-top lid
$18at HydraPak store, Mammoth
Check price for the HydraPak Stow™ 350ml at HydraPak store (opens in new tab)Full specs and sources for the HydraPak Stow™ 350mlLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 100 g per liter
- Collapses when empty
- Fits squeeze filters
- Leakproof
- Carry loop
Worth knowing
- Sold by one retailer we track (HydraPak store)
Platypus Platy® 2.0L Bottle
Lightest per liter
Image not availableColor not published
The Platypus Platy® 2.0L Bottle is a 2 L (68 fl oz) collapsible tpu water bottle that weighs 36 g. Its body is tpu (soft film).
It's the fourth lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (Platypus store).
- Capacity
- 2 L (68 fl oz)
- Weight
- 0.1 lb · 36 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Not published
$19.95at Platypus store
Check price for the Platypus Platy® 2.0L Bottle at Platypus store (opens in new tab)Full specs and sources for the Platypus Platy® 2.0L BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 18 g per liter
- Collapses when empty
- Dishwasher safe
- BPA-free
Worth knowing
- Sold by one retailer we track (Platypus store)
Image not availableThe HydraPak Protect Our Winters Stow™ 500ml is a 500 mL (17 fl oz) collapsible tpu water bottle that weighs 45 g. Its body is tpu (soft film), it ships with a flip-top lid and its opening is 28 mm.
It's the fifth lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (HydraPak store).
- Capacity
- 500 mL (17 fl oz)
- Weight
- 0.1 lb · 45 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Flip-top lid
$21at HydraPak store, POW Glacier Blue
Check price for the HydraPak Protect Our Winters Stow™ 500ml at HydraPak store (opens in new tab)Full specs and sources for the HydraPak Protect Our Winters Stow™ 500mlLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 90 g per liter
- Collapses when empty
- Fits squeeze filters
- Leakproof
- BPA-free
Worth knowing
- Sold by one retailer we track (HydraPak store)
Image not availableColors: Malibu
The HydraPak SoftFlask™ Speed 500ml is a 500 mL (17 fl oz) collapsible tpu water bottle that weighs 46 g. Its body is tpu (soft film), it ships with a sport (push-pull) cap and its opening is 42 mm.
It's the 5th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (HydraPak store).
- Capacity
- 500 mL (17 fl oz)
- Weight
- 0.1 lb · 46 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Sport (push-pull) cap
$22at HydraPak store, Malibu
Check price for the HydraPak SoftFlask™ Speed 500ml at HydraPak store (opens in new tab)Full specs and sources for the HydraPak SoftFlask™ Speed 500mlLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 92 g per liter
- Collapses when empty
- Leakproof
Worth knowing
- Sold by one retailer we track (HydraPak store)
Image not availableThe HydraPak Stow™ 1L is a 1 L (34 fl oz) collapsible tpu water bottle that weighs 51 g. Its body is tpu (soft film) and it ships with a flip-top lid.
It's the 6th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (HydraPak store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 51 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Flip-top lid
$17.60was $22at HydraPak store, Redwood
Lowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 51 g per liter
- Collapses when empty
- Fits squeeze filters
- Carry loop
Worth knowing
- Sold by one retailer we track (HydraPak store)
Vapur .7L (23 oz) Collapsible Anti-Bottle
Lowest price
Image not availableThe Vapur .7L (23 oz) Collapsible Anti-Bottle is a 700 mL (24 fl oz) collapsible water bottle that weighs 57 g. It ships with a flip-top lid.
It's the 7th lightest of the 15 bottles here and the least expensive here at $13.99. Worth knowing: sold by one retailer we track (Vapur store).
- Capacity
- 700 mL (24 fl oz)
- Weight
- 0.1 lb · 57 g
- Material
- Not published
- Diameter
- Not published
- Lid
- Flip-top lid
$13.99at Vapur store, Sea Glass
Check price for the Vapur .7L (23 oz) Collapsible Anti-Bottle at Vapur store (opens in new tab)Full specs and sources for the Vapur .7L (23 oz) Collapsible Anti-BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 81 g per liter
- Collapses when empty
- Leakproof
- Dishwasher safe
- BPA-free
Worth knowing
- Sold by one retailer we track (Vapur store)
Image not availableColors: Translucent Blue
The Vapur 1.5L (50 oz) Collapsible Anti-Bottle is a 1.5 L (51 fl oz) collapsible water bottle that weighs 57 g. It ships with a flip-top lid.
It's the 8th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (Vapur store).
- Capacity
- 1.5 L (51 fl oz)
- Weight
- 0.1 lb · 57 g
- Material
- Not published
- Diameter
- Not published
- Lid
- Flip-top lid
$17.99at Vapur store, Translucent Blue
Check price for the Vapur 1.5L (50 oz) Collapsible Anti-Bottle at Vapur store (opens in new tab)Full specs and sources for the Vapur 1.5L (50 oz) Collapsible Anti-BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 38 g per liter
- Collapses when empty
- Dishwasher safe
- BPA-free
- Carry loop
Worth knowing
- Sold by one retailer we track (Vapur store)
Image not availableThe Vapur 1L (34 oz ) Collapsible Anti-Bottle is a 1 L (34 fl oz) collapsible water bottle that weighs 57 g. It ships with a flip-top lid.
It's the 9th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (Vapur store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 57 g
- Material
- Not published
- Diameter
- Not published
- Lid
- Flip-top lid
$15.99at Vapur store, Blue Steel
Check price for the Vapur 1L (34 oz ) Collapsible Anti-Bottle at Vapur store (opens in new tab)Full specs and sources for the Vapur 1L (34 oz ) Collapsible Anti-BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 57 g per liter
- Collapses when empty
- Dishwasher safe
- BPA-free
- Carry loop
Worth knowing
- Sold by one retailer we track (Vapur store)
Image not availableColor not published
The Evolved Supply Co. Evolved ThruBottle 1000 is a 1 L (34 fl oz) polyethylene water bottle that weighs 63 g. Its body is polyethylene (hdpe/ldpe), it ships with a screw cap and its opening is 28 mm.
It's the 10th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (Evolved Supply Co. store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 63 g
- Material
- Polyethylene (HDPE/LDPE)
- Diameter
- Not published
- Lid
- Screw cap
$16at Evolved Supply Co. store
Check price for the Evolved Supply Co. Evolved ThruBottle 1000 at Evolved Supply Co. store (opens in new tab)Full specs and sources for the Evolved Supply Co. Evolved ThruBottle 1000Lowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 63 g per liter
- Fits squeeze filters
- BPA-free
Worth knowing
- Sold by one retailer we track (Evolved Supply Co. store)
Igneous NOBO Bottle
Slimmest
Image not availableThe Igneous NOBO Bottle is a 1 L (34 fl oz) polyethylene water bottle that weighs 64 g and is 81 mm across. Its body is polyethylene (hdpe/ldpe), it ships with a screw cap and its opening is 28 mm.
It's the 11th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (Igneous store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 64 g
- Material
- Polyethylene (HDPE/LDPE)
- Diameter
- 81 mm (3.2 in)
- Lid
- Screw cap
$18.99at Igneous store, basalt
Check price for the Igneous NOBO Bottle at Igneous store (opens in new tab)Full specs and sources for the Igneous NOBO BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 64 g per liter
- Fits squeeze filters
Worth knowing
- Sold by one retailer we track (Igneous store)
Image not availableColor not published
The CNOC Outdoors TKO 1L Vesica Collapsible Bottle is a 1 L (34 fl oz) collapsible tpu water bottle that weighs 67 g. Its body is tpu (soft film) and its opening is 28 mm.
It's the 12th lightest of the 15 bottles here. Worth knowing: sold by one retailer we track (CNOC Outdoors store).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.1 lb · 67 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Not published
$18.99at CNOC Outdoors store
Check price for the CNOC Outdoors TKO 1L Vesica Collapsible Bottle at CNOC Outdoors store (opens in new tab)Full specs and sources for the CNOC Outdoors TKO 1L Vesica Collapsible BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 67 g per liter
- Collapses when empty
- Fits squeeze filters
- BPA-free
- Carry loop
Worth knowing
- Sold by one retailer we track (CNOC Outdoors store)
Image not availableColor not published
The Katadyn BeFree is a 1 L (34 fl oz) collapsible tpu water bottle that weighs 76 g and has a built-in filter. Its body is tpu (soft film), it ships with a flip-top lid and its opening is 42 mm.
It's the 13th lightest of the 15 bottles here and the most expensive here at $52.95. Worth knowing: sold by one retailer we track (Garage Grown Gear).
- Capacity
- 1 L (34 fl oz)
- Weight
- 0.2 lb · 76 g
- Material
- TPU (soft film)
- Diameter
- Not published
- Lid
- Flip-top lid
$52.95at Garage Grown Gear
Check price for the Katadyn BeFree at Garage Grown Gear (opens in new tab)Full specs and sources for the Katadyn BeFreeLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 76 g per liter
- Collapses when empty
- Built-in filter (1,000 L)
- BPA-free
- Carry loop
Worth knowing
- Sold by one retailer we track (Garage Grown Gear)
Image not availableColors: white
The Nalgene 48oz Wide Mouth Ultralite Bottle is a 1.42 L (48 fl oz) polyethylene water bottle that weighs 135 g and is 89 mm across. Its body is polyethylene (hdpe/ldpe) and its opening is 63 mm.
At 0.3 lb it's the heaviest of the 15 bottles here. Worth knowing: heaviest bottle in this list.
- Capacity
- 1.42 L (48 fl oz)
- Weight
- 0.3 lb · 135 g
- Material
- Polyethylene (HDPE/LDPE)
- Diameter
- 89 mm (3.5 in)
- Lid
- Not published
$13.99at Nalgene store, white
Check price for the Nalgene 48oz Wide Mouth Ultralite Bottle at Nalgene store (opens in new tab)Full specs and sources for the Nalgene 48oz Wide Mouth Ultralite BottleLowest in-stock price as of Oct 25, 2026.
Stands out
- Ultralight: 95 g per liter
- Leakproof
- Dishwasher safe
- BPA-free
Worth knowing
- Heaviest bottle in this list
- Sold by one retailer we track (Nalgene store)
Questions, answered from the data
What are the lightest ultralight water bottles?
The Platypus SoftBottle™ is the lightest at 0.1 lb (29 g), by manufacturer spec.
What's the cheapest option?
The Vapur .7L (23 oz) Collapsible Anti-Bottle, with a lowest in-stock price of $13.99 this week.
How we chose
This list includes every bottle in our database that meets all of these criteria: 100 g or less per liter. Bottles are sorted by manufacturer weight, lightest first. Nobody pays to be included.
Specs come from manufacturer pages (or, for brands whose own sites we can’t read, a retailer’s page) unless marked otherwise, and every value links to its source on the product page. Prices are the lowest in-stock price we found on Oct 25, 2026 and change often.
This is a spec comparison, not a hands-on review. Summaries are written with AI assistance from verified data only. Read our methodology.