Davis Instruments LightCap 300 Red Bottle Cap Solar lantern and water bottle BPA-free and bottle is dishwasher safe Holds 32 ounces (.94 liters) Automatic light sensor turns the cap off in daylight for maximum battery charging for up to 15 hours of light Waterproof storage for important items and it floats BPA-free solar lantern and water bottle Holds 2-liters of water Solar powered cap with red or white LEDs and automatic function