Fun prank!! I pulled mine on coworkers. Be sure to take tops off before removing labels. Trim the bottom by dragging a sharp object along the creased area at the bottom. The labels peel off and stick by themselves. No tape or glue needed. Then put tops on. It's a great trick. The glitter is the best because it takes the person a while to catch on. I've found only these two kinds of OFF have the peel labels in this size. Good luck and happy pranking!!!