Best Lightweight Bottles in 2026

PORTABLE & PACKABLE- Crush the Seeker Hydration Reservoir when empty and store in the included storage bag. The flexible design makes it so light and compact, you'll forget it's in your pack.

VERSATILE WATER STORAGE - Wide working temperature range (can be frozen - max temp 60° C / 140° F).

WATER FILTER COMPATIBLE - Filter more water in the backcountry, most 42mm threaded filters (Katadyn BeFree) screw on to the top.

SAFE & SUSTAINABLE - Clear cap and bottle made of 50% recycled plastic, the equivalent of 9-single use plastic bottles

SMOOTH FLOW TWIST CAP - Provides an experience like drinking out of a glass. 180’ turn delivers the perfect flow, twist back to close for leakproof transport

GRIP GROOVE & CARRY HANDLE - Flexible bail handle is comfortable to carry, lightweight and nearly indestructible. Indented finger groove provides a flat edge for a better grip

HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing.

COLLAPSIBLE FLASK: Soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty.

PERFECT FOR AID STATIONS:UltraFlasks are equipped with our SpeedFill Cap designed for quick and easy refilling at aid stations. A side tab pops open the cap in one motion and snaps shut with a click.

PACKABLE - Expands for use and collapses back down to a 1 / 4 of its size for maximum pack space

LIGHTWEIGHT - 50% lighter than most hard bottles, the Stash is perfect for hiking, backacking or any other activity where space or weight are at a prem

)ULTRA DURABLE - Made of abrasive-resistant TPU, the Stash can stand up to whatever you throw at it

twist to collapse down to 1/4 of it's filled size when empty, minimizing the space it takes up in your pack

at 50% lighter than most hard bottles it's the most compact and convenient water bottle solution

the flexible walls, tpu carry handle & grip ring create a comfortable carrying experience

SKI, HIKE, BIKE & CLIMB COMPATIBLE - The Stow fits flush in ski pants and coat pockets, bike jerseys or fanny packs - flatten and roll when empty.

DURABLE & LIGHTWEIGHT- Made of abrasive-resistant TPU, the Stow can be frozen and is dishwasher safe, at under 2 oz it’s 80% lighter than most hard bottles.

POCKET SIZED - Flexible bail handle for comfortable carrying, quick attachment, and filling from a faucet, lake or river.

PORTABLE & PACKABLE- Crush the Seeker Hydration Reservoir when empty and store in bail handle. The flexible design makes it so light and compact, you'll forget it's in your pack.

VERSATILE WATER STORAGE - Wide working temperature range (can be frozen - max temp 60° C / 140° F).

WATER FILTER COMPATIBLE - Filter more water in the backcountry, most 42mm threaded filters (Katadyn BeFree) screw on to the top.

SKI, HIKE, BIKE & CLIMB COMPATIBLE - The Stow fits flush in ski pants and coat pockets, bike jerseys or fanny packs - flatten and roll when empty.

DURABLE & LIGHTWEIGHT- Made of abrasive-resistant TPU, the Stow can be frozen and is dishwasher safe, at under 2 oz it’s 80% lighter than most hard bottles.

POCKET SIZED - Flexible bail handle for comfortable carrying, quick attachment, and filling from a faucet, lake or river.

SKI, HIKE, BIKE & CLIMB COMPATIBLE - The Stow fits flush in ski pants and coat pockets, bike jerseys or fanny packs - flatten and roll when empty.

DURABLE & LIGHTWEIGHT- Made of abrasive-resistant TPU, the Stow can be frozen and is dishwasher safe, at under 2 oz it’s 80% lighter than most hard bottles.

POCKET SIZED - Flexible bail handle for comfortable carrying, quick attachment, and filling from a faucet, lake or river.

SKI, HIKE, BIKE & CLIMB COMPATIBLE - The Stow fits flush in ski pants and coat pockets, bike jerseys or fanny packs - flatten and roll when empty.

DURABLE & LIGHTWEIGHT- Made of abrasive-resistant TPU, the Stow can be frozen and is dishwasher safe, at under 2 oz it’s 80% lighter than most hard bottles.

POCKET SIZED - Flexible bail handle for comfortable carrying, quick attachment, and filling from a faucet, lake or river.

HANDHELD HYDRATION - Ultra light, designed for the minimalist runner, hiker, climber or fits in running vests or pack pockets.

COLLAPSIBLE WATER BOTTLE - Soft material conforms to your hand or pocket, and shrinks as you drink to reduce movement and pack away easily when empty.

SECURE FIT - Easy to hold, adjustable strap cinches down to fit different hand sizes

PACKABLE - At only 97g, it packs down smaller than a deck of cards. Your new thru-hiking essential.

WATER FILTER COMPATIBLE - Attaches to most 42mm threaded water filters such as the Katadyn BeFree. Use as your filter squeeze bag or drink directly through.

BAIL HANDLE - Flexible handle for comfortable carrying, quick attachment, and filling in a lake or river. When empty you can flatten and roll up in the handle for space saving storage.

HYDRATION VEST COMPATIBLE - Makes a great nutrition or hydration addition or replacement to your running vest, pack, or belt pocket.

COLLAPSIBLE FLASK - Soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty.

REFUEL ON THE GO - High-flow nozzle, designed to carry and dispense energy gels with an easy to clean nozzle. Holds 5+ servings.

Collapsible for easy use, storage and transport

Molded top and bottom provides 3 dimensional shape and lashing options

Constructed with TPU (thermoplastic polyurethane) for superior durability and flexibility

Two Cup Set

Flexible design - allows you to carry anywhere

Free standing when empty or full

HANDHELD HYDRATION - Ultra light, designed for the minimalist runner, hiker, climber or fits in running vests or pack pockets.

COLLAPSIBLE WATER BOTTLE - Soft material conforms to your hand or pocket, and shrinks as you drink to reduce movement and pack away easily when empty.

SECURE FIT - Easy to hold, adjustable strap cinches down to fit different hand sizes

HYDRATION VEST COMPATIBLE - Fits easily in most hydration vest, belt or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing.

INSULATED - IsoBound Insulation keeps water cold and won’t sweat in warm temperatures.

COLLAPSIBLE FLASK- Soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty.

SAFE & SUSTAINABLE - Clear cap and bottle made of 50% recycled plastic, the equivalent of 9-single use plastic bottles

SMOOTH FLOW TWIST CAP - Provides an experience like drinking out of a glass. 180’ turn delivers the perfect flow, twist back to close for leakproof transport

GRIP GROOVE & CARRY HANDLE - Flexible bail handle is comfortable to carry, lightweight and nearly indestructible. Indented finger groove provides a flat edge for a better grip

HYDRATION VEST COMPATIBLE - fits easily in most hydration vest, belt or pack pockets.

PACKABLE - Soft material conforms to any pocket.

COMPRESSIBLE - Shrinks as you drink reducing water movement.

UNIVERSAL FIT - Fits into most wide mouth bottles for spill-free drinking.

100% BPA & PVC FREE - No weird taste, no unnecessary and harmful chemicals.

BEYOND LIFETIME - If you experience any issue, we’ll repair or replace the item for free. Whatever it takes to keep your adventure going.

SMALLER VOLUME FLASK Meant to be carried in multiples - slides easily into short pockets, waist packs, belts and even PFDs.

SOFT NOZZLE Wide opening silicone nozzle is designed to dispense gels and liquids with a variety of consistencies. Makes fueling for long efforts more convenient and less sticky.

EASY OPEN CAP Protects the bite nozzle from dirt and debris. Can be flipped open and closed with one hand.