Premium Material-Food-grade silicone, BPA-free, safe for all drinks.</p >Leak-Proof Design-Screw on lid prevents leaks and spills during travel.</p >Portable&collapsible-Folds flat for easy storage in bags or pockets.</p >Easy to Clean-Wide mouth allows quick hand or dishwasher wash.</p >Perfect for hiking, camping, sports, and outdoor adventures.</p >