It works, but beware! My house is now filled with spirits who can move objects and have gone as far as to put my hand into a bowl of warm water while I was sleeping! When I woke up, the spirits had already emptied the bowl and put it back into the cupboard, but the evidence was all in the sheets.

This thing is awesome I use it everyday. Usually during the summer my ice would have melted before I even finish the drink. This keeps my drinks cold till the end and then some. However I did a test with this kup and full of ice it lasted over 38hrs and still had a lil less than a 1/4 cup of ice left. I ordered 3 of the smaller ones for the rest of my family they love them.