This cute tumbler charm is the perfect accessory just in time for spring and summer. It would make a great Teacher gift to show your appreciation. Use this on your favorite tumbler or insulated coffee mug. It is easy to attach, simply unscrew the clasp, slide through the handle and then 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 you can was it with soapy water.