Works well

Verified Buyer Reviewed by Matt from California on Sunday, August 21, 2016
They seem to keep my coffee hot. I'm still afraid of what will happen when they get dropped; we shall see. My wife wanted several to customize with a glass etching kit she has to give to friends and family. This kind of glass won't etch.
Of the 12 cups we ordered 3 or 4 have issues with the bottom piece of rubber staying on. So that's why the 4 star rating. I'm still deciding whether to return them or not.
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