Jar Opener (no force required)

Jar Opener

Equalizes vacuum in the jar

No force required 
Without fear of damaging the jar or lid
Useful not only for weak women ;-)

Additional materials:
A 1 euro cent coin or similar size (a screw washer that fits the prepared socket will also work)
Press the coin into the socket. It must go in tightly enough so that it cannot fall out on its own. The socket is slightly at an angle to better distribute the force.

Material: any

Infil: 30%

Walls: 4-6

Warning!
If you print this, you'll have to find another way to show your partner that you're the strongest male around. ;-)

PS.

See also my bottle opener project:
https://makerworld.com/en/models/989845#profileId-965257