My colleague and my kids occasionally eat the jelly for certain purpose. They often ask me to open the cap for them. Therefore, I try to make a tool for them to do it by themself.
Printing with PETG is recommended.
The cap is composed of 36 triangular grooves with diameter around 16mm. It's a special tool for the special hard-to-open design. If you are “in” jelly enthusiast, it's a tool to open it like piece of cake.
The author marked this model as their own original creation.