Is it because they have nothing to do with Christmas?
Is it because it is unhealthy?
Is it because they aren't environmentally friendly?
Is it because Christmas DAY is when you get the treats. You don't need a small one every day on the run up to it?
Would you also object to the felt ones with pockets or wooden ones with drawers being filled with chocolate coins, sweets, candy canes, strings of popcorn etc? Or just strings of popcorn if your reason is because it is unhealthy?