The Camelbak Kids Mini Mule 50oz. Hydration Backpack is a new product designed for young cyclists. It has a 50-ounce water capacity and features insulation, a straw, and a Crux reservoir model. The backpack is made of synthetic material and is BPA/BPS/BPF free. It comes in a tie-dye blue color and is suitable for bike applications. The backpack is not a custom bundle and has not been modified. However, it does come with a California Prop 65 Warning due to the potential exposure to chemicals that can cause cancer and birth defects.