This wine tumbler is made of silicone, with a round rim that won't scratch your lips, the cup body is smooth and comfortable. It can be used in the refrigerator and microwave. It's great for camping trip, picnic, pool party, beach outing, and tailgate party.PMS available for product color and imprint. Overseas production. Lower quantity available. Includes ocean freight except Q1 and Q2 which are air freight delivered to NY.