Bike handlebar storage

I recreate the handlebar plug to give a better grip and reinforce it to not break easily.

The main storage part was modified to use a heat insert to use with a M5x20mm screw.

Also increase the storage to 150mm with a closed end to prevent some small bits to fall, like valves and stuff like that.

My recommendation is to be printed with ASA or ABS because it needs some flex.