I made mine almost 4 years ago and i use it everyday for both hot and cold drinks, I measured the circumference of the mason jar and overlapped by about a half inch. I used 3 plan old rivets to hold it together and attached the handle the same way. I have had no issues at all with the jar slipping out. This pic was taken just after I made it. It has darkened in the most amazing way. Love my mug holder