Silica gel sports cup, food grade silica gel size 260*65mm(600ml). It can be rolled and folded with a fixed band for clamping and storage. Portable - strong and comfortable, drinkable; rolled up for compact travel; wrist rings are easy to carry; attached to a bag for quick access. Durable - strong enough to withstand the elasticity of water droplets, shatterproof silica gel body, to ensure that you stay water nomadic during travel or activities. Leak-proof-Eliminate Leakage and Spill Patents, Seal Torsion Cover, Double as Sanitary Nozzle Cover to Prevent Bacteria from Your Throat.