It just occurred to me that you could install that bent metal piece on the bottom of a bench or something near where you usually do you glue ups and and only need one hand to open a bottle.  Just slide the top into the slot and pull down.  It would be sort of like having a bottle open installed in the shop  but instead of beer for your glue bottle.

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.