Health MaterialThese 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 InformationThe capacity 11.6oz330ml.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 outdoor. Humanized Design: 2 pack with 2 color: Blue & PinkThe 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 around. Multipurpose:Updated collapsible design, space saving and only 0.59 in when collapsed, fits well in your pocket, purse, backpack, suitcase and takes up no space, ideal for outdoor hiking, camping, travel, and sport events Easy 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 safe.