The filtered water reaches or even surpasses the high standard of direct drinking water, which can effectively remove impurities, sediment, rust, residual chlorine, fluorine, peculiar smell, bacteria  in the water, and at the meanwhile maintain the water-base balance and retain the mineral constituents in water. The 300ml volume is more suitable for children, and the bottle is designed to bionic the penguin's cute appearance, which is in line with children's preferences. Silicone bottle covers protect children from injuries.