TKWide Insulated Tumbler with Café Cap
All-steel insulated body, but the popular Café Cap sips through a polypropylene spout - a corrective for the common assumption that a Klean Kanteen coffee mug is plastic-free.
Plastic-free verdict: Minimal plastic contact
The tumbler body is 18/8 stainless steel with a smooth steel drinking lip, so on its own the vessel is plastic-free. The catch is the cap most people buy it with: the leakproof Café Cap is built from stainless steel, polypropylene (#5), and food-grade silicone, and the sip spout your lips meet - and the coffee flows through - is the polypropylene. So with the Café Cap on, hot coffee runs over plastic every sip. It is included here as a corrective: a "Klean Kanteen coffee mug" is widely assumed plastic-free, but the standard coffee cap puts polypropylene squarely in the sip path. Drinking from the bare steel tumbler (or with the splash-only Tumbler Lid) keeps the drink on steel.
Verification: Manufacturer confirmed · reviewed 2026-07-05
What it's made of
| Part | Material | Food contact |
|---|---|---|
| tumbler body 18/8 stainless steel, Klean Coat exterior; smooth steel drinking lip | Stainless Steel (304 / 18-8) | Yes |
| Café Cap sip spout / body BPA-free polypropylene (#5); the sip spout the coffee flows through and your lips touch | Polypropylene (PP, | Yes |
| Café Cap loop / structure stainless steel loop/handle elements on the cap | Stainless Steel (304 / 18-8) | No |
| Café Cap gasket food-grade silicone sealing gasket | Silicone | Yes |
Klean Kanteen's wide-mouth insulated tumbler paired with the Café Cap, the leakproof lid that turns it into a to-go coffee mug. The steel body and its rounded steel lip are exactly what people want, but the Café Cap - stainless, polypropylene, and silicone - routes the drink through a plastic spout. Klean Kanteen's own bottle Loop Caps achieve an all-steel interior, but the Café Cap is not one of them: its drink-contact spout is plastic.
Pros
- 18/8 steel body with a steel drinking lip; excellent build quality
- B Corp brand with strong plastic-free bona fides elsewhere in the line
- Café Cap is leakproof and fully disassembles for cleaning
Cons
- Café Cap sip spout is polypropylene - coffee contacts plastic every sip
- Marketed in a way that implies "plastic-free" when the coffee cap is not
- A truly steel sip path needs the bare tumbler or a different cap
Notes
- The splash-only Tumbler Lid is an open-drink lid: you sip over the steel rim, though that lid itself is plastic and not leakproof
- Klean Kanteen bottle Loop Caps create an all-steel interior, but the Café Cap does not - its spout is polypropylene
Categories: Travel Mugs & Tumblers
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.kleankanteen.com/products/tkwide-cafe-cap brand states the Café Cap is made of stainless steel, polypropylene, and food-grade silicone, and is BPA-free
- manufacturer https://www.kleankanteen.com/collections/insulated-tkwide TKWide bodies are food-grade 18/8 stainless steel with a smooth rounded drinking lip and Klean Coat finish