About this item Premium-Grade 304 Stainless Steel --- Crafted with heavy-duty 304 stainless steel, these cups are polished inside and outside to look beautiful and elegant. The smooth-rolled rim is designed to deliver a smooth lip feel—no sharp edges, just a comfortable sip every time. Note: These cups are single-wall so they are not insulated and condensation will form with icy beverages. Easy to Clean --- The water cup is very sturdy and 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. A Better Alternative to Glass and Plastic Cups --- This stainless steel cups are made of 18/8 stainless steel which can better avoid corrosion. Instead of fragile glass, our stainless steel cup won’t shatter or break if/when dropped on the floor. Not like plastic which tends to smell, these fairly light and handy cups will keep the drinks’ original flaor. Stackable Design & Easy Storage --- This water drinking cups can be stacked on each other, allowing a 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. Suitable for Different Ages --- We provides a choice of 6.8 oz to 20 oz capacity, they can be easily held in hands for use. The cup adopts simple convenient design and production process, which has advantages over traditional plastic and glass drinking glasses, suitable for any occasion, and is also very suitable for gift giving.