Cereal Drybox Stabiliser

I use a bunch of the airtight cereal boxes to store filament, and they are great, but they are rather unstable and fall over a lot due to the narrow base (or my general clumsiness). I made this simple stabilising foot to stop them from falling over all the time. I have also supplied the STEP file, and tried to upload the F360 file, but it wouldn't validate for some reason. Let me know if you want the F360 file, and I will be happy to send it across.