Health MaterialThese outdoor collapsible cups are made of Food grade silicone,doesn't absorb flavors or smells.The collapsible travel cups come with lids that go on tightly, keeping contaminates out of your cupEasy To Carry & Clean:The wrist strap on collapsible cups allows you to attach them to your backpack, diaper bag,toiletry bags, or whatever you need to attach it to.Temperature Range from -40F to 480F,easy to clean and dishwasher safeSize InformationThe capacity 8.5oz250ml.Before folding,Top diameter 3.15In,Bottom diameter 1.77In,Height 3.35In.After folding, Top diameter 3.15In,Height 0.98In (Update the traditional technology, the collapsible cup only have 0.98In when folded ).The small collapsible volume made them both of these use for home and outdoorHumanized Design:1 Set of colorful expandable Cups contains 5 cups - 1* Blue,1* Red, 1 * Orange,1* Green,1*Pink.The tab on the bottom of the cup makes it easy to open it up as well as making it more stable when placed on a flat surface. The mouth of the cup is reinforced with a metal ring so it doesn't collapse or flop aroundMultipurpose: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