This cute charm is a perfect way to dress up your favorite tumbler. You can also use it in your favorite insulated coffee mug that has a handle approximately 2.5 inches high. It is easy to attach, simply unscrew the clasp, slide through the handle and reattach the clasp. If the clasp is hard to reattach you may need to pull back on the beads a little bit. It is not recommended that you put this in the dishwasher but it can be washed with soapy water.