Christmassy calendar of cans
December is a month in which most people typically have many gatherings with friends and family. Someone thought it would be nice to hide a present for each calendar day in a different can, marked with the day’s date.
It seems as if the shape of the cans is one big triangle, working as a dual calendar and Christmas tree. This person probably didn’t think it through because, if they had, the wrapping paper would have been green.