A Stainless Steel Glass last longer than glass or plastic because they are corrosion resistant, and do not leach chemicals when exposed to sun/heat. Stainless steel is a very popular metal for making water storage ware and drink ware. Pitchers, glasses and water bottle made of stainless steel are very popular among people who are looking for a long-lasting and sustainable option. It is safer to drink out of a steel tumbler (glass) as opposed to a glass tumbler (glass glass), because glass can break, shatter and cause injury while steel is quite sturdy. The Stainless Steel Glass is very safe for use.