Scratching my head trying to figure out something cool to enter for this competition all of sudden it stuck me. Why not make a handle to hold the can? Nah that is slightly more boring than the next idea. Make a stein that you can put your drink in. It has a cover that you can keep your drink safe with and some awesome style!
Printing this you don't need any supports! The lid and the body of the stein print seperately. The lid pops into the hinge at the top and has a good tight tolerence. Recommended the pause the print once the base is up enough to hold your can. Test how well it fits. If it is too tight increasing the size in your slicer by 1% should be plenty. Only reason I say this is I made the tolereance very tight and not all printers are made the same. Once done this is an increadibly awesome piece! Enjoy!