Double-wall insulated design is great for hot or cold drinks. Strong and durable. Dishwasher, freezer and microwave safe. Crystal-clear clarity rivals glassTervis tumblers are virtually indestructible. They won?t crack, melt, shatter, or chip. However, if they do somehow break (despite following our care instructions), they won?t leave you hanging. They?ll replace it, guaranteed. Comes in a gift box.