king do way 17oz Double Wall Vacuum Insulated Stainless Steel Water Bottle Perfect for Outdoor Sports Camping Hiking Cycling Picnic Stainless Steel High-quality food grade 18/304 stainless steel on both inside and outside walls, scratching resistance, 100% BPA Free for heath-safety. Unique double walled vacuum insulation technology with vacuum-seal cap keeps your drinks cold for 12hrs and hot for up to 24 hrs. Lightweight design, perfect for your gym bag, car, bicycle and backpack to enjoy your long hikes, trekking, hot yoga class, long load trip, or any other outdoor activities. Specially designed cap to prevent spills, wide drip-free mouth opening for ice cube insertion (mouth:3.6cm) and easy to drink. Fashion design, looks cool, you will love it yourself and want to gift it to family and your friends.