Saw something like this on Joel the 3D printing nerd's channel but was for tall, slim cans. Couldn't find the original one to modify so made my own to fit standard 330ml cans, then I thought I'd upload it here in case anyone else wanted to try it out. I printed out both parts from PLA. The plunger should come in to your slicer ready to print, but the holder needs to be flipped to avoid supports.There is a bit of tolerance between the can holder and plunger, but if your printer has Z wobble or over extrudes a bit you might find it a tight fit. If this happens you can sand the edges down to make it fit or reprint the holder scaled up slightly.

To operate put the can in the holder, squeeze it in a bit through each of the 5 slots and push it down with the plunger. Makes a nice little compressed package which so far hasn't left any sharp edges for me. Its pretty much an exact size to hold the can which makes getting the plunger in a bit of a challange, but squeezing the sides of the can helps by lowering the top a bit.