1[Stainless Steel Material] Beer cup is made of high quality stainless steel, which is durable, not easy to rust, and can be used for a long time. 2[Safe And Harmless] Beer mug with exquisite workmanship, which is safe, non toxic and harmless, so you can use it with confidence. 3[Stackable Design] With stackable design, you can store them in any cup holder, drawer or cabinet at home, or in an outdoor backpack, can effectively saving space. 4[Simple To Clean] With mirror polishing inside, easy to clean, and can effectively reduce washing time, very suitable for camping, RV, etc. 5[Widely Application] This drinking cup can be used to hold all kinds of beverages, juices or anything you like, and can be reused.