Washable, never moldy
Comes fully apart. Dishwasher-safe and boil-safe — no salt-water soaks, no hidden valves quietly growing mold.
Drink clean · keep it cleaner
About 240,000 plastic particles are floating in every liter of bottled water. Finally, a filter straw you can throw in the dishwasher. From the water to your lips, only glass and metal.
And the straw on your filter bottle? Probably still plastic. We're building the opposite — a glass-and-metal filter straw and cup you can actually keep clean. No weekly salt-water soaks. No hidden valves growing mold. It comes fully apart, washes clean, and the filter just swaps out. Most filter bottles still pour your drink over a plastic lid, valve, and mouthpiece. Ours never lets your water touch petroleum plastic.
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Filters microplastics above 0.2 µm · third-party certification in progress
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replaceable carbon filter · above 0.2 µm
The problem
The problem isn't just the water — it's everything it touches.
Microplastics reach your water from packaging, pipes, and the bottle itself. Most "solutions" add plastic right back: plastic lids, plastic valves, plastic mouthpieces. Filtering at the very last inch — through a water path that never touches petroleum plastic — is simply a cleaner idea.
From packaging
From pipes
From the bottle itself
Filtered at the last inch — glass & metal only
What we get right
Three things every other filter straw gets wrong.
It comes apart into five parts — glass, steel and silicone — so every surface actually gets clean.
Only glass & metal touch your water
Borosilicate glass, food-grade steel, and a platinum-cured silicone tip. Your drink never runs over petroleum plastic.
Silicone is a silicone elastomer — not a petroleum plastic like PET/PP/PE. We'll show exactly what every part is made of.
Replaceable filter
Swap the cartridge, keep the cup. Cheaper over time — and far less waste than tossing the whole straw.
How we compare
How it's different from what's out there.
Typical filter straw
(e.g. LifeStraw)
(e.g. LifeStraw)
Sift
Cleaning
Weekly disassembly, salt-water soaks
Comes apart → dishwasher-safe
Mold
Common complaint; not covered by warranty
Designed to come fully clean
Filter
Whole straw disposable
Swap the cartridge
Water path
Plastic bottle, lid & mouthpiece
Glass & metal only
Comparison based on public product specs and reviews. We filter microplastics above 0.2 µm — see "What we won't claim" below.
In the wild
Made for everywhere you actually drink.
Founding members
Be first in line.
We're validating real demand before we manufacture a single unit. Join the list for founding-member pricing and a say in the final design.
No spam — just build updates. Unsubscribe anytime.
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Welcome aboard. We'll be in touch at your address before anyone else.
Straight talk
What we won't claim.
We'll never tell you your water is "plastic-free." Micron filters can't remove nanoplastics — nothing portable can, short of reverse osmosis.
→What exactly do you filter?
We filter microplastics above 0.2 µm, and we'll publish third-party test results before we make a single performance claim.
→Isn't silicone a plastic?
Silicone isn't a petroleum plastic. It's a silicone elastomer — and we'll show you what every part is made of.
→Where's your certification?
Certification is in progress. Until it's in hand, we won't display a badge we haven't earned.