One-handed operation: drinking water made easy, at the touch of a button, thanks to the ONE closure. Wear, open, drink, close and then everything from the front. The Sigg WMB One is an innovative metal children's water bottle for school and sports. 100% leak-proof: this leak-proof drinking bottle for children can even withstand carbonated drinks and is ideal as a sports bottle for athletes of all ages. Will survive any adventure! High-quality and durable material: a fun and environmentally friendly water bottle made of lightweight but robust aluminium, which is suitable for new adventures and has been produced in a climate-neutral way. Safe drinking: all SIGG bottles are free from harmful chemicals, such as oestrogen-containing substances and phthalates. So your child can safely enjoy every sip from its odourless and tasteless BPA-free drinking bottle A wild assortment: made in Switzerland, which has been developed with special care to meet the demands of children, give them the opportunity to exercise and support their ambition to explore the world.