Here's something to do with empty bottles. Clear ones work best. I used some old medicine ones that I have.
Find a design that appeals to you. I printed out a paw pattern at 50%. I've found that the more intricate designs lose a little of their crispness. This time I went with a bold pattern.
Place a few overlapping strips of painters tape on a cutting surface. Trim the pattern and place it over the tape. Now tape the pattern down.
Using an X-acto or other sharp blade, carefully cut out your design.