It has been found that plastic degrades through aging.  The wear of constant washing can lead to the leaching of harmful chemicals, exposing our children to toxins.  SIGG’s patented food-safe internal lining is inert, taste-neutral and will not crack even when the bottle is dented.  They can even be used for fruit juice, carbonated and hot drinks.  The SIGG bottles are almost indestructible and leak proof.  They are made to last!