Mizu M8 with Stainless Steel Cap
Single-wall 18/8 steel bottle paired with Mizu's all-stainless screw cap, so the water path is steel plus a small silicone gasket.
The verdict: Silicone only
The M8 is a single-wall 18/8 stainless bottle. It ships with a plastic loop cap, but Mizu sells a dedicated all-stainless M-series Steel Cap, and with that cap the water path is 18/8 steel sealed by a small removable silicone gasket - nothing plastic touches the drink. We rate it in that steel-cap configuration; with the stock plastic loop cap it would be minimal-contact. An affordable, widely-sold alternative to the Klean Kanteen / Hydro Flask steel-cap route.
The M8 ships with a plastic loop cap; this all-stainless M-series cap is what makes the water path plastic-bar-the-gasket. Buy it separately.
What it's made of
| Part | Material | Water contact |
|---|---|---|
| bottle body (single-wall) 18/8 (304) food-grade stainless; some finishes add an exterior powder coat that does not contact the drink | Stainless Steel 304 / 18-8 | Yes primary |
| Loop cap (stock - replaced by the Steel Cap) ships with — replace Plastic loop cap the M8 ships with. | Polypropylene PP, #5 | primary |
| Steel Cap (add-on - replaces the stock plastic loop cap) Mizu's all-18/8-stainless M-series cap; a separate SKU. | Stainless Steel 304 / 18-8 | Yes primary |
| cap gasket small removable silicone sealing gasket - the only non-metal part in the water path | Silicone | Yes seal |
Mizu's M8 is a lightweight single-wall narrow-mouth 25oz stainless bottle - no insulation, so it's lighter and cheaper than a double-wall bottle. The all-steel M-series cap it takes fits every M-series body (M5, M8), so one cap covers the range. It's the affordable end of the "steel body + steel cap" route that Klean Kanteen and Hydro Flask also sell.
Pros
- Among the cheapest ways into an all-steel drink path
- One cap fits the whole M-series line (M5, M8)
- Light single-wall body; the silicone gasket is small and removable
Cons
- Doesn't ship this way - the all-stainless cap is a separate purchase
- Single-wall, so no insulation
- Some finishes use an exterior powder coat (doesn't touch the drink, but worth noting)
- The all-steel cap has been intermittently backordered
Notes
- Popping the silicone gasket out gives a fully steel path, but you lose the leakproof seal
Common questions
Does the Mizu M8 with Stainless Steel Cap have plastic in it?
No petroleum plastic touches your water. On the Mizu M8 with Stainless Steel Cap, the cap gasket is silicone, and the rest of the water path is stainless steel.
What is the Mizu M8 with Stainless Steel Cap made of?
Part by part, the Mizu M8 with Stainless Steel Cap is: bottle body (single-wall) — stainless steel; Steel Cap (add-on - replaces the stock plastic loop cap) — stainless steel; cap gasket — silicone.
Does the Mizu M8 with Stainless Steel Cap have silicone in it?
Yes — the cap gasket is silicone on the Mizu M8 with Stainless Steel Cap. It is a seal rather than a surface your water sits against, which is stainless steel.
Is the Mizu M8 with Stainless Steel Cap BPA-free?
No plastic touches your water on the Mizu M8 with Stainless Steel Cap — the water path is stainless steel and silicone — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Where is the Mizu M8 with Stainless Steel Cap made?
The Mizu M8 with Stainless Steel Cap is made in China.
Categories: Water Bottles
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.mizulife.com/products/m-series-stainless-steel-cap Mizu M-series Stainless Steel Cap is 18/8 food-grade stainless and fits all M-series bottles
- manufacturer https://www.mizulife.com/products/m8 M8 is a 25oz single-wall 18/8 stainless bottle; ships with a loop cap
- review https://www.amazon.com/Mizu-Signature-Multiple-Colors-Bottles/dp/B07X5G1WTH Signature Loop Cap listing (the stock cap) - fits M5/M8/V8, distinct from the all-stainless replacement cap
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.