This is a smart little case to store up to 4 spark plugs (the plug fitted in the picture is an NGK Iridium BR9EIX).
The case has print-in-place hinges, and functions straight off of the print bed. No supports are needed. The tolerances in the hinges is 0.3mm. The spark plug screws into each pod to keep it secure and from rattling around inside.
I designed this because I was invited to a Christmas dinner party with a group of Paramotor Pilots and we had a Secret Santa so I had to bring a gift for a random person - but I knew that all of us fly Paramotors. The one certainty that I knew of is that we all need spark plugs and it's good to take some with you to the flying field in case you need to switch one out on your motor. Therefore, I designed this!
It is the perfect small gift for a paramotor pilot! There are two files included, and one has an outline of a paramotor and wing inset on the lid of the case. The other file is plain (perhaps a gift for someone who rides off-road bikes instead?)