Quooker Flex + CUBE
A single-spout boiling/hot/cold tap on a stainless under-sink tank, plus the CUBE add-on for filtered chilled and sparkling water - the closest thing to a stainless drinking-water path among multi-way taps.
The verdict: Minimal plastic contact
The headline is genuinely good: Quooker markets the Flex tap and its vacuum-insulated under-sink tank as stainless steel "rather than plastic or copper," so the boiling/hot/cold water dwells in and pours from steel, not a plastic tank. The CUBE reservoir that holds the filtered chilled and sparkling water is described as stainless by retailers too. Two things keep it out of the top tier: the filter cartridge housing is plastic (the universal filter concession), and Quooker does not disclose the wetted material of the CUBE's carbonation path - so we can't certify the sparkling water fully avoids plastic. Far less plastic contact than any all-plastic countertop system, but not confirmed plastic-free end to end.
Verification: Community reported · Last reviewed
What it's made of
| Part | Material | Water contact |
|---|---|---|
| tap spout / body Quooker markets the tap as stainless steel rather than plastic or copper; grade unspecified | Stainless Steel grade unspecified | Yes primary |
| under-sink tank (boiling/hot reservoir) vacuum-insulated stainless tank; an activated-carbon filter sits inside it; grade unspecified | Stainless Steel grade unspecified | Yes primary |
| CUBE reservoir (filtered chilled / sparkling) described as stainless by retailer listings; Quooker's own CUBE page does not restate the material - medium confidence, and grade unspecified | Stainless Steel grade unspecified | Yes primary |
| CUBE filter cartridge (medium) combined activated-carbon + hollow-fibre filter, ~12-month life | Activated Carbon / Ceramic Filter Media | Yes primary |
| CUBE filter cartridge housing plastic cartridge housing - the unavoidable filter concession every system shares | Plastic other / unspecified | Yes primary |
| carbonation / CO2 injection path Quooker does NOT disclose the wetted material of the CUBE's carbonation path; assumed plastic pending confirmation - this is the main reason the sparkling path is minimal-contact, not no-contact | Plastic other / unspecified | Yes primary |
| seals / O-rings not individually documented; present in every such system | Silicone | Yes seal |
A single tap fed by two under-sink units. The base tank (COMBI/PRO) delivers 100C boiling plus regular hot and cold from one spout; add the CUBE and the same spout also pours filtered chilled still and sparkling water - up to five water types from one tap. A premium, plumbed-in appliance that needs professional installation and is built to last years.
Pros
- Boiling/hot/cold water dwells in and pours from a stainless steel tank + tap (manufacturer-stated)
- CUBE adds filtered chilled + sparkling from the same spout - a true multi-way tap
- Vacuum-insulated tank is efficient and long-lived
- No countertop clutter; replaces a kettle and a sparkling-water machine
Cons
- Filter cartridge housing is plastic (category-wide)
- Quooker does not disclose the CUBE carbonation-path material - sparkling water not certifiable as plastic-free
- Very expensive; requires professional installation
- Annual filter + periodic CO2 cylinder running costs
Notes
- The CUBE is an add-on to a Quooker tap + tank; it cannot run standalone.
- CO2 cylinder yields roughly 60L of sparkling water before replacement.
Categories: Faucets
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.quooker.co.uk/taps/flex-round Flex tap + tank, "up to five water options" with CUBE; finishes include stainless and brass
- manufacturer https://www.quooker.co.uk/tanks/cube CUBE adds filtered chilled + sparkling; combined activated-carbon + hollow-fibre cartridge; CO2 cylinder ~60L
- review https://www.sinks.co.uk/quooker-flex-pull-out-boiling-water-tap-with-tank-stainless-steel/ retailer confirming the tap and under-sink tank are stainless steel
- forum https://en.wikipedia.org/wiki/Quooker describes the vacuum-insulated tank and in-tank activated-carbon filter
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.