Why not?

Can you differentiate a drinking glass in a compelling and ownable way, and become famous for it?

Well, the Tervis Tumbler™ is just that.  Except they are not a Killer Brand, because as successful as they are, very few people know about them by name, even when they are drinking from one.  Are you familiar with the brand?

A Tervis Tumbler™ is a glass made from two layers of clear plastic around a layer of air for insulation.  The expectation could not be more clear nor better delivered.  Hot or cold, or full of ice, Tervis Tumblers do not sweat, no matter the surrounding humidity.  The insulation air layer does the trick.

I think the product was originally developed for boating and/or yachting, as a thermal glass that kept drinks cold, and eventually caught on for outdoor use.  I think the “no sweat” expectation is much more compelling indoors.  I drink iced coffee, iced tea, soft drinks and water over ice all day.  It is great to have a glass that will not damage furniture no matter where you set it.

The Tervis Tumbler™ is probably better known as an advertising medium itself than a brand of drinking glass, for the insulated layer provides a perfect place for another brand’s logo.  Mine has a big Georgia “G” fabric patch in it.  Now you know what they look like, don’t you?