Health Material --- These outdoor collapsible cups are made of Food grade silicone,doesn't absorb flavors or smells,environmentally friendly and reusable.The collapsible travel cups come with lids that go on tightly, keeping contaminates out of your cup. Size Information --- The capacity 350ml. Before folding, Top diameter 8cm, Bottom diameter 7cm, Height 12.5cm. After folding, Top diameter 8cm, Height 5.5cm. The small collapsible volume made them both of these use for home and outdoor. which is very suitable to be placed in pockets, backpacks, suitcases, and does not take up any space. Multipurpose --- These folding travel cups are multi-purpose. From home to outdoor traveling and Hiking, to kids, to adults, for your pets. Ideal for outdoor hiking, camping, travel, and sport events Its limitless to what you can use them for. The temperature range is -50 to 100. The foldable small size and light weight which used these as your toiletry cups for brushing teeth/rinsing but could also be used as drinking cups on a camping trip. Drinking Cup with Lid--- The silicone collapsible cups have a hand strap that can be hung on the lid, and the size inside the cup is easy to read. The metal rim makes the cup stable and maintains its shape, making it easier to hold and drink.