The 12oz collapsible cup is made of food grade silicone which is BPA free and non-toxic.Easy to press to fold and pull to unfold.The PP lid with sip hole and silicone cover is perfect for sealing and anti-spilling.The 2 PP sleeve rings on the cup is removable and special designed to provide protection when enjoy hot drinks.Silicone cup can bear high temperature up to 446 Fahrenheit and PP parts can bear a temperature up to 212 Fahrenheit.It also features anti-sliding bottom.3.26" L x 2.32" W x 5.39" H