Review on Copco 2510-9965B Acadia Travel Mug, 16-Ounce, Plum - Enhanced for SEO by Tammy Campbell

Sturdy mug with comfortable non-slip grip but maybe I misunderstood the description? "The lid has a quarter-turn locking mechanism that helps prevent messy spills." I picked it up with the lid rotating to open and close the drinking hole. Not correct. This means that the lid is screwed on lightly so it doesn't pop out. The drinking hole cannot be closed, so if the cup is shaken or dropped, the contents will squirt out. And since the drinking connection is always open, "double-walled insulation" is of no use for hot drinks. All the heat escapes through the hole and my coffee stays warm for about fifteen minutes. If they sold a lid for a lid I would love this mug.