How much technology could there be in a simple plastic cup? Well when it’s a Tervis Tumbler, the answer is a lot. Whoever is responsible for the double wall construction should be given a medal or at least many pats on the back. They keep cold things (like ice cream and drinks) cold…they keep hot things (like soup or coffee) hot…they don’t sweat and they even have a lifetime guarantee. What more could you ask for in a cup? Lots of choice in available designs? Yes – they have that too.