From Black Lagoon Designs:

"Meet my latest cocktail mug, my Tiki Torch with light up flame.

The flame has been made out of resin and hand-painted with glass paint and then re-coated with resin. Please ensure that you keep this item out of high heat as the resin element may warp and discolour if exposed to large amounts sunlight. This item should not be machine washed, a gentle hand wash is all that should occur.

Each mug will arrive with at least 3 little lights which are re-usable (just keep the little tab and push it back in once you are finished with it) each light will last for about 24 hours so you shouldn't need to replace any but if you would like more just search for balloon LED lights on Ebay. (Obviously the light can not be washed).

These tiki torches stand at approx. 27cm tall by 8cm wide and hold approximately 350mls of your favorite cocktail OR mocktail!. They are made by hand from white earthenware pottery, resin, lead free food safe glaze and love.

Each of these mugs has been handmade and with firing processes the top does not fit exactly perfect so be sure to keep a finger on the top part if you are prone to excitedly large hand gestures when drinking!"