Tervis Tumbler
American drinkware manufacturer
Tervis Tumbler Company is an American manufacturer of double-walled, insulated tumblers. The double-wall insulation is made by inserting a liner inside an outer shell, creating a layer of air between them. The two liners are then permanently fused together. The insulation reduces condensation and keeps beverages hotter or colder longer than non-insulated cups and glasses.
History
The original technology was developed by two engineers, Frank Cotter and G. Howlett Davis, in Detroit, Michigan in 1946. Their design involves a permanently sealed double-walled tumbler. Cotter and Davis combined the last three letters of their surnames to come up with the name Tervis. John C. Winslow purchased the Tervis product rights in the 1940s. The Tervis Tumbler Company was incorporated in 1967.
In January 2018, "Trinity Graphic USA Inc., based in Sarasota...
“Tervis Tumbler” enters the record as american drinkware manufacturer. Crown Archives preserves that source wording while asking what Tervis, Tumbler and American can confirm, complicate or overturn.
Why this record matters
“Tervis Tumbler” is worth following because a concise public description often conceals a longer documentary argument. Here, Tervis, Tumbler and American provides the most credible route into that argument.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jan 15, 2026. The linked authority identifier is Q7705362. 2 of 3 selected statements include explicit references; 2 carry qualifiers and 0 use preferred rank. The first chronological checks are 1946, 1967 and 2018.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Tervis Tumbler” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.