Planning Hydration for a Day Outdoors
Half a litre per hour, one insulated plus one light bottle, and sips on a schedule - hydration arithmetic.
Bottles, tumblers & travel mugs
Two steel walls seal around a 0.6 kPa vacuum, and a three-turn cap holds it there.
Every Summit and Trailhead body spends a night inverted on blotting paper in the Fill Lab - a lid that weeps overnight never reaches a shelf.
- Residual pressure sealed into every vacuum gap
- 0.6 kPa
- Full turns that seal a Sipwell screw cap
- 3 turns
- Loaded-drop height cleared before listing
- 1.2 m
Studio picks
The four that never stay in stock
The bottles, flasks and sets our regulars reorder before anything else runs out.
From daily carriers
Carried everywhere, and honest about it
The Summit rides my bike rack every day. Filled with ice at seven, still cold and rattling at five - and the coral one survived a full tumble down a gravel drive with one proud dent.
I asked which bottle would fit my tiny car cup holder and got a reply naming two that would and one to avoid. The Slim Pearl fits perfectly and has ended my petrol-station coffee cup habit.
Two kids, two Splash bottles, zero wet school bags in a full term. The straw parts pull off for cleaning, which anyone who has smelled a forgotten juice bottle will understand is everything.
BPA-Free Materials
Food-grade stainless steel, borosilicate glass and silicone - nothing else touches your drink.
Leak-Tested Lids
Every lid design is filled, inverted and shaken in the Fill Lab before it ships.
Free Shipping Over $45
Tracked delivery in recycled kraft packaging, dispatched within two days.
Exchanges, No Fine Print
Wrong size or colour - unused drinkware swaps freely within 30 days.
Fill Lab
Sealed, shaken and dropped before it ships
Every lid is filled, inverted overnight and shaken through a simulated commute. Every body is dropped loaded from bag height. Seals that weep and lids that pop go back to the bench - what ships is the version that stopped failing.
See how we testHow it works
Four choices that decide whether a bottle gets carried
The method behind every bottle that actually gets carried.
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Pick your size
Match capacity to the hours between refills - the day decides, not the shelf.
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Choose the lid
Straw for the desk, flip-lock for the car, loop for the trail - lids swap freely.
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Fill it right
Ice or a preheat gives the vacuum wall a head start it holds all day.
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Rinse and repeat
Ten seconds of rinsing a day keeps a good bottle in service for years.
Start here
One bottle for the desk, one for the door
Most people need exactly two: an insulated bottle that lives where they work, and a sealed mug that travels. Start with the Summit and the Commuter, or give both at once with a boxed set - every listing states capacity and cup-holder fit plainly.
Shop gift sets
Bring a better bottle.
Free tracked shipping over $45 - pick a size, choose a lid and carry it for years.
