This cute charm is the perfect tumbler accessory for your tumbler. It can also be used on your favorite insulated coffee mug with a handle approximately 2.5 inches tall. It is easy to attach , simply unscrew the clasp, slide through the handle then reattach the clasp. If the clasp is hard to attach you may need to pull back on the beads a little bit. This is made with silicone beads and a sturdy cable wire. It is not recommended that you put this in the dishwasher but you can was it with soapy water.