Keychains for Ikea Skadis. 

Do you have the Euroshopper, or a ego brick on your keychain? I've got you covered.

Or just print the one that locks into the Skadis like a glove.

I printed the Lego and Euroshopper in PLA, and PETG carbon.

0.15 layer height with supports

The other one can be printed without support