This is a holder for the removable K-Cup brewing attachment on GE Café refrigerators. Stick a fridge magnet or two on the back and it can hold it on the side of the fridge.
Version 2 holds the attachment better (the profile was flipped & the arms thinner on version 1) and includes recesses for 13mm neodymium magnets. (It can still be used with adhesive linoleum fridge magnets, just ignore the holes.) If you still want to download Version 1, it is included in v1.zip.
Use at least 3 shells. I printed it in PETG; the material properties of other filaments may be different enough that this won't work well (the arms need to flex for the brewer to snap in). If you have any settings you use to make prints stronger (e.g. throttling the cooling fan), turn them on.
I literally just put the holder on my flatbed scanner, imported it into Fusion 360 as a decal, calibrated it with a U.S. quarter also in the scan, traced the outline, and extruded. It was extra satisfying because the design worked the first time.