When you're going, tumblers are the way to go. A copper liner, two layers of recycled stainless steel, and a vacuum gap combine for outstanding insulation — drinks stay hot for hours, cold for days. The integrated strap makes clip-and-carry easy, and the Swig Lid delivers just-right flow for hot and cold drinks. And the whole thing — base to lid — is BPA-free, durable, and dishwasher-safe. carry strap.