You're right. People didn't overthink things back then. My name is Curt, not Leon though.I have to agree with Leon. Elmers Glue Stick should work just fine. When the labels were originally put on the bottle no one cared what glue was used they just put it on the label and slapped it on the bottle. There are bottles out there that have had there labels for over a hundred years with no problems with the glue destroying the label. I doubt if modern glue, such as a glue stick, made for applying paper to other objects is going to do any damage.