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