plasticfree
Products / Water Bottles
i
Stanley Quencher H2.0 FlowState Tumbler (40oz)

Stanley Quencher H2.0 FlowState Tumbler (40oz)

Not recommended

The viral 40oz tumbler has a recycled-steel body, but the FlowState rotating lid and reusable straw are plastic and you sip through or over them - so it is not plastic-free despite the steel-cup reputation.

We don't recommend this one

For a steel water path, choose the Klean Kanteen Reflect or the Hydro Flask Wide Mouth with the all-steel cap instead - both keep the drink on steel with only a silicone gasket.

The verdict: Minimal plastic contact

The tumbler body is 18/8-grade stainless (Stanley states 90% recycled stainless steel), but the entire drink path is plastic. The FlowState rotating lid is BPA-free Tritan-family plastic, the reusable straw is plastic, and silicone gaskets seal the lid. Whether you sip through the straw or over the drink opening, your mouth and the water meet plastic. Included as a corrective: the Quencher is the most viral "steel tumbler" in the category, and buyers routinely assume the steel cup means a plastic-free drink - but the lid and straw are exactly where the plastic is.

Verification: Manufacturer confirmed · Last reviewed

Lead safety: Lead found, not in contact path

Independent XRF testing of a 2023-purchased Stanley 40oz Flowstate Quencher H2.0 Tumbler (this exact product) found the interior food-contact stainless steel, exterior silicone, plastic cap, handle, and reusable straw all non-detect for lead. However, destructive testing confirmed a lead-based sealing dot under the bottom cap, used to seal the vacuum-insulation layer - a construction method Stanley later confirmed publicly. The dot is outside the drink path, but becomes exposed if the bottom cap/button detaches, which a meaningful share of users have reported happening even under normal use.

Verification: Independently lab-tested

Buy from Stanley View on Amazon

What it's made of

PartMaterialFood contact
tumbler body (double-wall insulated)
Stanley states 90% recycled 18/8-grade stainless steel
 Stainless Steel
304 / 18-8
 Yes primary
FlowState rotating lid (3-position cover)
BPA-free Tritan plastic; the drink opening and straw port you sip over
 Tritan
copolyester
 Yes primary
reusable straw
reusable plastic straw; water travels up through plastic
 Plastic
other / unspecified
 Yes primary
lid gaskets Silicone Yes seal
handle
molded plastic carry handle, exterior
 Plastic
other / unspecified
 No

The Quencher H2.0 is the tumbler that went viral - a big recycled-steel cup with a carry handle and a rotating FlowState lid that gives you a straw hole, a drink opening, or a full seal by twisting. It holds cold for hours, fits a car cup holder, and comes in 30oz/40oz/64oz across endless colorways. It's a fine insulated tumbler; it just isn't a plastic-free one, and there's no all-steel lid to make it one.

Pros

  • Recycled 18/8-grade stainless steel body with strong insulation
  • Materials are labeled BPA-free and the lid/straw are replaceable

Cons

  • Whether you sip the straw or drink over the opening, your mouth meets plastic
  • Marketed as a "steel tumbler" in a way that hides the all-plastic drink path
  • No all-steel lid option to convert it to a steel water path
  • Leaded sealing dot under the bottom cap, exposed if the cap detaches (see Lead safety)

Categories: Water Bottles

Sources

Every material claim above is backed by these. This is the scattered info we centralized.

Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.