Insulated tumbler, 30-40oz. Straw and handle lids trade retention for convenience.
Sourcing unresolved.
A vacuum insulated tumbler in the 30-40oz range, offered with a straw lid or a handle lid. Independent testing on a comparable 30oz sealed tumbler measured 12.4C after 24 hours from a 1C start — worse than a sealed bottle of similar size, and testers attribute part of the gap to the straw port acting as a leak path. Straw and gasket ports are the most commonly reported failure point on tumblers of this type. Cost basis is assumed similar to insulated bottles pending an MOQ check with suppliers, so that number isn't confirmed yet. Food-contact documentation follows the same requirement as the bottle line: UK docs required before any food-safe claim.
| Category | Drinkware |
| Capacity | 30-40oz |
| Verified cold retention (30oz sealed benchmark) | 12.4C at 24h from 1C |
| Failure modes observed | Straw/gasket port leaks (most common complaint) |
| Compliance | UK food-contact docs required |
straw/gasket ports leak; biggest complaint theme
UK food-contact as bottles
Every spec on this page is checked against independent sources before listing. See methodology.