Fill
Any tap, fountain or stream. Fill the bottle you already have.
Portable universal water filter
Clean water from
your own bottle.
One filter that pushes into a disposable bottle or fits your tumbler.
Watch it work
Simple Sip in 26 seconds.
Fill a bottle, drop the filter in, cap it and sip.
Meet Simple Sip
Drink way more water, from the bottle you already own.
One filter that pushes into a disposable bottle or fits your tumbler with a lid adapter. Carbon and a micro-mesh pre-filter reduce chlorine and sediment and improve the taste, so you actually finish the bottle.
- Disposable bottles, no adapter needed
- 20, 30 and 40 oz tumblers with the lid adapter
- Carbon cartridge plus micro-mesh pre-filter
Four steps, no tools.
The same filter, whichever container you pick up.
Filter
Push it into the bottle, or into the lid adapter on your tumbler.
Sip
Draw through the carbon cartridge. Less chlorine, less sediment, better taste.
Swap
When the cartridge is used up, fit a new one. The housing and spout stay.
Wherever you drink
Pick the container. The filter is the same.
Trail
Disposable bottle. The filter alone.
Pre-order the filter
Travel
Airport water, hotel taps, the train.
Pre-order the filter
Job site
On a 40 oz tumbler, all shift long.
See the adapters
Everyday
Desk, gym bag, car cup holder.
See the adapters1 / 4
Drink smarter
The water is already there.
Bring the filter.
One filter on the trail, at the gate and at your desk.
The problem with filter bottles
They lock you into their bottle.
Most portable filters only work with the bottle they came in, and few fit an insulated tumbler. Simple Sip pushes into the bottle in your hand and fits the tumbler on your desk with a lid adapter.
- Disposable water bottles, no adapter needed
- 20, 30 and 40 oz tumblers with the lid adapter
- A housing that telescopes to the right depth
What's inside
A cutaway of the housing, straight from the engineering files.
- Activated carbon cartridgeReduces chlorine and sediment, improves taste.
- Micro-mesh pre-filterCatches particles before they reach the carbon.
- Telescoping housingFood-safe silicone seals at every length.
The facts, as they stand
- Patent pendingProvisional patent application filed.
- NSF/ANSI testing underwayIndependent third-party testing before launch.
- Three tumbler adapters20 oz, 30 oz and 40 oz, sold separately.
- Easy to cleanRemovable silicone mouthpiece and a protective cap for transport.
Side by side
Simple Sip or a filter bottle?
What changes when the filter is the product, not the bottle.
| Feature |  Simple Sip | A filter bottle |
|---|---|---|
| Works with the bottle you already have | Yes | No |
| Fits your tumbler with a lid adapter | Yes | No |
| What you carry | The filter. One piece. | Their bottle, every time. |
| Switching containers | Move the filter. | Buy another of their bottles. |
| Price | $19.99 | Varies by brand. |
Pre-order the filter. Add the adapter for your tumbler.
Charged in full at checkout. Ships early 2027.
Simple Sip
Universal filter. Fits disposable bottles on its own.
$19.99
Stanley 40 oz Tumbler Adapter
Lid adapter for 40 oz Stanley style tumblers with a handle.
$9.99
Yeti 30 oz Tumbler Adapter
Lid adapter for 30 oz Yeti style tumblers.
$9.99
Yeti 20 oz Tumbler Adapter
Lid adapter for 20 oz Yeti style tumblers.
$9.99
Ready when you are.
Pre-order now and your filter ships early 2027. Not sure yet? The waitlist costs nothing.
Good to know
Questions, answered.
Shipping, fit, testing and cleaning, in plain words.
When does it ship?
Pre-orders are expected to ship in early 2027. If the date moves, we email you and you can cancel for a full refund.
What is in the box?
The Simple Sip filter: the bottle adapter cap, the telescoping housing with the activated carbon cartridge and micro-mesh pre-filter, the removable silicone mouthpiece and a protective cap. Tumbler lid adapters are sold separately.
Which tumblers does it fit?
On its own, Simple Sip fits standard disposable water bottles. With a lid adapter it fits 20 oz and 30 oz Yeti style tumblers and 40 oz Stanley style tumblers with a handle. Simple Sip is not affiliated with Stanley or Yeti; the names describe tumbler styles.
Is it certified?
Not yet. Independent testing to NSF/ANSI standards is underway, and we will post the results here when they are in. Until then we describe what the filter is designed to do and publish no test figures.
What does the filter reduce?
An activated carbon cartridge reduces chlorine and sediment and improves the taste and odor of tap water. A micro-mesh pre-filter catches particles before they reach the carbon.
How do I clean it?
The silicone mouthpiece pulls off for rinsing, and the protective cap keeps the spout clean in your bag. We will publish full care instructions for the housing and cartridge before the first batch ships.
Not ready yet? Join the waitlist.
One email when the first batch ships, and one before it does. Nothing else.
Pre-orders are charged in full at checkout and ship early 2027.