The Drinco travel tumbler with straw has been constructed with a sturdy stainless steel body a material lauded for its durability. Effective insulation with a see-through screw on cap to keep your drinks hot and cold. ✅ DURABLE CONSTRUCTION: The coffee mug has an attractive powder coated finishing that will give you a good grip at all times. The compact shape fits into your hand and most cup holder indestructible, scratch resistant, no temperature transfer, safe and easy to clean over time. ✅ VACUUM INSULATION: Our vacuum thermos insulated tumbler, coffee cup with splash proof lid keeps it sweat-free from the outside, no matter what you drink. The ultimate portability and comfort large mouth makes it easy to drink.