This 500ml Tritan bottle, in black/yellow, from iDrink, reference ID2129, is a reusable bottle made of transparent copolyester. Tritan is a BPA-free, transparent, and virtually unbreakable copolyester that does not retain odors or stains and is resistant to both heat and cold, and is dishwasher safe. This is the most compact version of the same black/yellow pattern, also available in 1000ml and 1500ml. It is a preferred option for those who like this more vibrant contrast but prefer the smaller size of this range.