"D.M. Procida" wrote in
message
...
I want to make an unopenable jam jar - one that will resist the
strongest grips.

What's the best way to achieve this?

I imagine that filling it up with boiling water, running a seam of
superglue along the rim and thread then screwing the lid on tightly
would get the best results.

Daniele


Marmalade round the rim seems to work in our house.