Know every sip,
on any bottle.
Uddak snaps onto your bottle, recognises it, measures the water inside and logs what you drink to your phone. Move it to the next bottle and it keeps counting.
Ships to Canada and the US · Free app for iPhone and Android
Today
0.85 L
of 2.00 L goal
How it works
Three steps, then you just drink.
- 1
Snap it on
Each bottle wears a slim base-cap ring. The smart cap snaps onto it magnetically and wakes up by itself.
- 2
It knows the bottle
A tag in the ring tells the cap which bottle it is on, its size and its shape. Mark full and empty once.
- 3
Every sip is logged
The cap measures the water level after each drink and sends it to the Uddak app. Refills never count.
85% full · Still
See every sip, live
Uddak knows which bottle it is on and what shape it is. The app draws your bottle with its real water level, sloshing while you drink and settling when you put it down.
Made for real days
Built around the bottles you already own.
One cap, many bottles
Move the cap between your desk, gym and car bottles. Each one is recognised.
Sips, not guesses
Measures the real water level, so it knows a sip from a refill.
Gentle reminders
A nudge only when you fall behind your goal, plus low battery and cap-left-off alerts.
Never loses a sip
The cap stores sips while your phone is away and sends them when it is back.
Apple Health & Health Connect
With Uddak Plus, every sip lands in Apple Health or Google Health Connect automatically.
Snap-on charging dock
The cap snaps onto its dock to charge. A built-in battery and no port keep it sealed for life.
Food-safe where it counts
Everything water touches is food-grade; the electronics stay sealed away.
Choose your Uddak
Every kit works with the free Uddak app. Add rings any time.
Uddak Starter
One smart cap for your favourite bottle
$50
In the box
- Magnetic Uddak smart cap
- 1 base-cap ring with NFC tag
- Magnetic charging dock
- Uddak app for iPhone and Android
Uddak Shelf
One cap that roams across three bottles
$89
In the box
- Magnetic Uddak smart cap
- 3 base-cap rings with NFC tags
- Magnetic charging dock
- Uddak app for iPhone and Android
Ring pack
Three plastic base caps for more bottles
$20/ pack
In the box
- 3 plastic base caps with NFC tags
- Food-grade silicone gaskets
- Recognised by your cap instantly
Outer shell
Fit your Uddak Core to another bottle, or change its colour
$12/ each
Choose at checkout
- Sized for 48, 53 or 63 mm bottles
- Six colours
- Snaps around the Core in seconds
Uddak Tumbler lid
For 40 oz straw tumblers (Stanley-style)
$15
In the box
- Replacement lid with straw port
- Dock for your Uddak Core
- Counts sips through the straw
Uddak Plus
Your water in Apple Health and Google Health Connect
$60/ year
Every year
- Sync every sip to Apple Health
- Sync to Google Health Connect on Android
- Free replacement base caps and gaskets
- Priority support
Questions
Which bottles does Uddak fit?+
Any bottle that takes one of our base caps, plus 30 and 40 oz straw tumblers with the Uddak Tumbler lid. The app knows six shapes (straight, slim, wide, curvy, shouldered and tumbler) and draws your bottle to match.
Does it work with Stanley-style straw tumblers?+
Yes. The Uddak Tumbler lid replaces your 30 or 40 oz tumbler's lid and has a straw port. The cap snaps on beside the straw and counts sips even though you never tilt the tumbler.
What is the outer shell?+
All the electronics live in the Uddak Core, which is the same for every bottle. The outer shell snaps around it and matches your bottle's cap size and colour, so the cap sits flush. Shells are $12 each, in 48, 53 and 63 mm sizes and six colours.
Is it one account for the app and the website?+
Yes. Sign in with the same email or Google account in the Uddak app and on uddak.com. Your orders, Uddak Plus and your water history all show up in both.
How does it know how much I drank?+
A sensor in the cap measures the water level from above. When you set the bottle down after a drink, the drop in level becomes millilitres using that bottle's size and shape.
Do I need my phone nearby?+
No. The cap stores your sips and sends them the next time your phone is in range, so nothing is lost.
How do I charge it?+
Snap it onto its magnetic charging dock, the same way it snaps onto a bottle. The battery is built in and rechargeable, so it never needs replacing, and there is no port to let water in.
Which payment methods can I use?+
Checkout is handled by Stripe. You can pay by card, and with Apple Pay, Google Pay or Link where your device supports them. Promo codes are accepted.
Does Uddak work with Apple Health and Google Health Connect?+
Yes, with Uddak Plus ($60 a year). The Uddak app writes each sip to Apple Health on iPhone or Health Connect on Android, after you allow it.
Can I cancel Uddak Plus?+
Yes, any time from your account page with Manage billing. It stays active until the end of the year you paid for.