Dynore stainless steel hot and cold sports/refrigerator bottle is made of good quality stainless steel. Bottle Inner material is Plastic & outer is Steel. There is a small hole on the outer side of the bottle for saving inner material to be spoilt from hot water leak proof. It is neatly covered so it doesn't effect the look of the bottle. Hot and Cold Capacity is 2- 3 Hours Best Usage: Office/School/College/Gym/Picnic/Home/Fridge The bottle has multiple uses right from numerous outdoor activities like hiking yoga exercises to using it for you office and work from home set up as well The bottle comes with an easy to carry strap making it portable and convenient "Package content: 2 pieces sports water bottle Material: Stainless steel color: Silver and capacity: 900 ml Dimension: 7.5x7.5x29.5 cm " Set of 2