Material: Collapsible cups for traveling are made of food-grade stainless steel material, which is strong, durable, safe and not easy to deform or rust for long time use. Due to the thermal conductivity of stainless steel, please be careful not to be scalded when filling hot water. Easy To Carry: The camping mug comes with a key ring that can be clipped to your belt loop and backpack for easy carrying. The foldable cup is easy to unfold and collapsed. Great Choice: Foldable drinking cup with a combination of creativity and practicality can be not only a particularly creative gift, but also a travel and home essential to hold ice water, hot coffee and other beverages you like to drink. Wide Application: Collapsible mug is perfect for outdoor activities, such as camping, fishing, travel, picnics and home. This stainless steel mug works as camping mugs, travel cups, camping cups, best travel items, collapsible coffee cup, folding cup, collapsible travel cup. Design: These unique stainless steel collapsible camping cup can be folded or shrunk to a convenient size, which saves space for you. 2 pieces of stainless steel collapsible travel cups are enough for backpack, glove box, tackle box, boat, etc.