About this item 【Double-wall cup & heat insulation】The special double-wall cup design is more thermally insulated than single-wall water cups, and lighter than ordinary thermos cups. The special double-layer cup wall structure can effectively slow down the temperature loss of the beverage in the cup, suitable for hot water, juice, cocktails, frozen beverages, and can be used repeatedly for a long time. 【Stacking Design & Easy Storage】One package contains four cups, which can be stacked on each other, allowing one cup to fit inside another cup, saving space and easy to put in any cupboard and drawer. Very portable, perfect for travel, camping, beach, picnic. 【Safe & Environmental】Made of 100% food-grade safe and hygienic stainless steel metal, rust-proof, drop-proof, sturdy and durable, it does not contain any harmful chemicals by itself. There is no metallic odor in use, and all the flavors of the drink can be maintained. The cup is polished inside and out, and the surface is smooth.. The metal material used is recyclable, which is more environmentally friendly and safer than plastic. 【Suitable for Children and Adults】Choice of 10 oz to 17 oz capacity, both adults and children can easily hold the cup wall for use. The cup adopts modern design style and production process, which has advantages over traditional plastic drinking glasses and glass drinking glasses, suitable for any occasion, and is also very suitable for gift giving. 【Easy to Clean】The water cup is very sturdy, dishwasher safe. The inside and outside of the cup body have been specially treated, which is not easy to leave water stains, very easy to clean. The product has a long service life and can be used repeatedly after cleaning.