This double wall stainless steel tumbler is perfectly suited for hot drinks or cold icy water. Not only is it great for children and adults alike, but it is a wonderful camping companion. And at home, the elegance of this tumbler even makes it ideal for a dinner with friends. Also fabulous for expresso, cappucino, moccachino... No risk of breakage by dropping this tumbler on the ground. It is made of 18-8 food grade 304 stainless steel, and thus does not contain toxins associated with plastic. It will not rust and should last for generations. An excellent investment, especially since it will grow with your child, and the whole family can use it!