Foldable camping cup made for added strength and durability with EU food grade silicone rubber and durable stainless steel The innovative design allows the cup to fold down to 31 mm in height for storage or expand to a fully functional 475 ml cup The cups feature Cool-Grip fins molded into the side walls so you can comfortably hold hot or cold drinks Sea to Summit We have invented foldable tableware and this is our most robust foldable cup to date Generous 474g capacity for more of your favorite hot or cold drinks. Sea to Summit warranty is offered for the lifetime of this product