Modern Innovations 17oz Double Wall Vacuum Insulated Stainless Steel Water Bottles Leak Proof Keeps Drinks Hot and Cold for Outdoor Sports Camping Hiking Cycling VACUUM INSULATED WATER BOTTLES: These stainless steel water bottles are double-walled and vacuum sealed with an inner copper lining increasing thermal insulation so beverages stay hotter or colder longer. Keep your drink cold for at least 18 hours or hot for at least 10 hours while the exterior of the bottle remains thermally unaffected by its contents. THE BEST TRAVEL ACCESSORY: These 17-ounce water bottles come in handy for all occasions whether youre hiking up a mountain trail, taking a gym class, or packing lunch for the day. The wide mouth opening can accommodate large ice cubes and fruit infusions. It can also fit in standard-sized cup holders. PREMIUM STEEL & DURABLE DESIGN: Made from high quality BPA free 18/8 stainless steel, these bottles are very durable and will last for a long time. NO LEAKS OR SPILLS: The cap was specially designed to prevent spills, making it perfect for carrying in your gym bag, purse or car. Product Dimensions: Each bottle is 10 tall with approx. 2.5 diameter across the bottom. GREAT GIFT: These water bottles make for an inexpensive and practical gift that people will actually use. Order yours today!