This is a replacement for the bulky keyfob cover on the current MINI keys. It makes them smaller, and this version also has a nice Union Jack flag on it. The flag is created as individual parts, so it can be printed in color....

It should be tuned on its side (looking from the top, you see a U-shape), then it only needs minimal supports.

Infill is 100%, since it is very thin and has to be sturdy.