Tropical Foldable Bottle 0.5 L, 18 OZ Assorted plastic Foldable - Stands upright when full. Rolls, folds or flattens when empty. Reusable and Safe - Ultra-durable, BPA-free with FDA-approved polyethylene inner-liner (odor, taste and stain resistant). Washable - Easy to clean! Top-rack dishwasher safe or by hand. Air dry as needed. Freezable - Can be frozen to keep beverages cold. Attachable - Included carabiner can be attached to any bag, purse or backpack.