How to Tell a Fake Tervis

Tervis is a brand name for tumblers, as well as other accessories, such as ice buckets and lids with straws. Made of two layers of high-quality polymer --- with air in the middle for insulation --- Tervis tumblers were designed by Frank Cotter and G. Howlett Davis in 1946. The designers combined the last three letters of their names to create the name "Tervis." There are a variety of ways that you can tell if your Tervis tumbler is a fake.

Instructions

- 1
  Check the bottom of your tumbler. All Tervis tumblers have the name "Tervis" on the bottom, as well as a description of their money-back guarantee. If there is no "Tervis" or the money-back guarantee on the bottom, your product is a fake.
- 2
  Check the condition of your Tervis tumbler after a few weeks or months of use for cracks or tears, as well as damage from heat or cold. According to the manufacturer, Tervis tumblers will not chip, melt, crack or shatter. If your tumbler shows any signs of such damage, chances are it is not a real Tervis.
- 3
  Test your tumbler to see how "sweat-proof" it is. Tervis claims that, although no drinking vessel is completely "sweat-proof," Tervis tumblers rarely, if at all, leave water marks. Pour a cold drink with ice in your tumbler, set it down on a wooden or glass surface and look for any condensation rings on the surface. If a pool of condensation eventually appears on the surface, your tumbler may not be a Tervis.

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