The Brees Copper Vacuum Tumbler with FSC Bamboo Lid 14oz features durable, double-wall stainless steel vacuum construction with copper insulation, which keeps beverages hot for up to 8 hours or cold for up to 24. The construction is designed to prevent condensation on the outside of the tumbler. This tumbler body features an on-trend, durable powder coated finish with a natural FSC-certified bamboo press-on lid. Recommended hand wash only.