Unbreakable insulation bottle made of food safe 18/8 stainless steel. Excellent insulation properties thanks to a double-walled construction with vacuum insulation. Great hydration system with one-handed folding drinking spout and clever mounting clip. The large screw enables quick filling and easy cleaning of the bottle. Fits into all standard bottles and cup holders. Tasteless. 100% Recyclable. 100% BPA free. Take everywhere with you, hang on your backpack.