The bottle is made of 18/8 eco-friendly premium stainless steel. 17 oz double walled vacuum insulation stainess steel water bottle. It is is convenient for you to carry and suitable for outdoor sports, leisure, camping, hiking and travelling. The double wall stainless steel feature prevents condensation and burns, retaining the temperature of your beverage. These reusable bottles are great for hiking, biking, gym, travel, school, work, and just about anywhere you might get thirsty! Available in custom logo.