Why are you choose them?Health Materials: The collapsible travelcup made of food grades silicone, no small, non-stick and keep your health.Space Saving: with the collapsible design,never take up your space.Inside Measuring Design: Easy to read withthe measuring inside of the cup.PE Dust Lid: The tight and snugly fittinglids can prevent any dust and dist from the air.Portable Hook and Connective Hand Rope:Combination of both can string the cup and dust cover together to preventaccidental drop.Stainless Steel Cup Rim: The stainlesssteel rim at the top is strong and maintains the integrity of the collapsiblecup, make the cup much easier to hold and drink.Easy to Clean: With the inner wall adoptssmooth design, not easy to be sticky and just wash it under the runningwater(dishwasher available)The Detail Size Information:Capacity:17 oz (500 ml ) Bottle height:7.08 ins (18cm) Folded thickness: 1.57 ins (4cm)Package include:1 set Silicone Collapsible Travel Cup