1.What's Included in the Package: the package comes with 4 pieces of coffee tumblers with lids in 4 colors, black, white, navy blue, green; The capacity of the cup is about 13 oz; Rich colors and quantity can feed your drinking and replacing needs, you can also share them with others 2.Stainless Steel Material: the body part of this 13 oz travel coffee mug is made of 304 stainless steel, reliable and , not easy to rust, and has no bad smell, and the sealing ring part is made of silicon, which can serve you for a long time 3.Double Layer for Keeping Temperature: you can use this stainless steel reusable coffee cups with lids to hold hot water, ice coffee, tea, beer, beverage and other drinks well, turn clockwise to tighten the lid, it can keep warm for 6 hours, keep cold for 12 hours, ing you a good using experience, insulation performance refers to the room temperature above 20 degrees centigrade, and it is suggested that please pour hot water above 97 degrees centigrade in 4.Anti Slip Bottom: the bottom of the insulated coffee mug is designed with rubber, which makes the cup stand firmly on the smooth surface, such as wooden tables, glasses table, stone tables, and more, which will not easy to fall