Description 30 oz double walled vacuum insulated tumbler 18/8 stainless steel with copper lined insulation  Gather a crowd at your next event with this fantastic Big Joe Tumbler as your next giveaway! Acrylic lid It holds up to 30 oz.of coffee or juice and features vacuum sealed copper insulation, keeping drinks hot/cold for up to 12 hours. Top rack dishwasher safe Do not microwave