Vintage Compact Drinking Cup Camping

Description

This came out of a box of stuff that came out of my grandfather's house. I was in the army during WWII but I don't think this was part of his gear. He use to do alot of camping with my mom when she was young. I think this not have come from that.  It stands about 2.5 inches tall when it is extended to drink out of it. It is about 2.5 across the mouth. The lid fits tightly and does not come off if I turn it upside down. Please feel free to ask any questions you may have. Thank you for looking and happy bidding.