Collapsible Silicone 20oz Water Bottle (Set of 2) - Reusable Foldable Leak Proof Sports Canteen Camping Hiking Cycling Yoga Crossfit Air Travel - EXTRA LIDs Included (Clear, 20oz) SAFE TO USE - Food Grade Silicone Water Bottle where manufacturer has certificate to show it's BPA Free and FDA (USA) and LFGB (Germany) approved. The lid is Food Grade, BPA Free, PP Plastic. TIP: If you have water in the bottle for a longer time (at room temperature), the water will taste differently as it will interact with the air, absorbing carbon dioxide making it slightly more acidic. This is normal, just like if you had glass of water on a table. SPACE-EFFICIENT - Foldable (by rolling it up) and using retainer band to keep it folded. PORTABLE - Metal carabiner to clip-on for hands free transport and easy access. EXTRA LIDS - Each bottle is individually packed in clear poly bag with an extra lid, shipped in set of two bottles. We now also include an insert (piece of paper) in the package (you might still get one without the insert, as there are some left in stock without it, but as long as our logo is on the bottle, you know you got the right bottle). FREEZABLE - You can have cold liquid with you for hours!