The 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 removable cap to keep your drinks hot and cold.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.