Vintage Diet Pepsi One Calorie 6.5" Insulated Tumbler Cup 16 oz. Thermo Serv

This is a vintage Diet Pepsi One Calorie insulated plastic tumbler by the brand Thermo Serv. The piece measures about 6.5" tall and holds 16 oz. of liquid. The exterior clear plastic has some scratching typical from use and age. The final photo shows one slightly indented dimple defect. It could be a manufacturing issue or it could have been exposed to heat at some point. Please zoom in on all photos for full conditioning details.