Stainless Steel Double Walled Tumbler embellished with Crystals. Each BUBBLE & BLING double walled stainless steel Travel tumbler is for hot or cold beverages. Each one comes with certified “food proof lid” with slider vent for straw! Holds 20 oz and keeps your beverages cold or hot for hours! Fits most car holders. Must be hand washed and do not microwave!! Important Warning: Leave vent open until hot liquid cools down before closing. Liquid stays hot for hours so be careful of spilling while carrying.