For freshwater sailors, big and small. Diving into mysterious underwater worlds with Willy the whale is simply the best. And always refreshing. The high-quality, recyclable aluminum drinking bottle is extremely easy to transport and is equally suited to both school and leisure activities. The material is free from harmful chemicals, such as estrogen-mimicking substances and phthalates – for safer drinking enjoyment. The spill-proof child cap also ensures easy transport, even when things get adventurous!