Manufacturers of some of the best water bottles you will find, Sigg products have been specified by explorers and mountaineers the world over. Created from lightweight high quality Aluminium with a screw thread stopper and rubber seal, the outside of the bottle has an anodised coating for protection, while the inside is lacquered to stop unwanted tastes and odours. This coating is resistant to fruit acids often found in energy drinks, ensuring a long and reliable lifespan.