4. [Easy to Clean] Different from other single-layer roll-lip stainless steel cups, the internal dirt is not easy to clean, our seamless cup not hide dirt, and cleaning is very simple. 3. Double-layer design, effective heat and cold resistance, when used to hold hot or cold drinks, you don't need to worry about overheating or cold hands. 2. Unbreakable stainless steel, don't worry about breaking, can replace bulky and fragile glass and ceramic cups. The smooth edge 't hurt your mouth and tongue. 1. Made of high-quality SUS304 stainless steel, safe, rust-proof and , very suitable for daily use. 5. [Multi-purpose] The mug is perfect for parties, picnics, camping, travel, can be used to hold juice, milk, water or other beverages, suitable for indoor and outdoor use.