I've had some of my flower rat designs printed onto larger acrylic charms and made them into keyrings (and necklaces too!)
They are all printed on to recycled acrylic and are one-sided (the reverse side is just white). Great to attach to bags too if you want to add rats to everything ;)
All are at https://creatoriq.cc/3X0N7bf (please note last postage dates have passed for standard, non-tracked mail anywhere outside of the UK for Christmas).