BPA-free, reusable, collapsible, recyclable medical-grade silicone multi-use water bottle. These are microwave, dishwasher and freezer safe, mold-resistant, no harmful chemicals, retains their shape and are reversible for cleaning. Good for hot and cold beverages, compresses or pillows; use for ice or hot pack; good for stress and arthritis pain relief; use as warmer for bed, hands or ski boots; use for storing laundry detergent, cleaning products, dry or liquid medicines, milk, juice, breastmilk, matches, bandages, dry goods (rice, oatmeal, tea, coffee, cereal) or waterproofing electronics. Great for all sports, including hiking, biking, boating, skiing, camping, sailing, canoeing, water sports, scuba diving and hunting.