This works! You keep these gel packs in the freezer and when you want to turn a drink into a slushi, you just drop them in your drink like ice cubes, put the lid on and SHAKE. After a few minutes, you have a slushi! You have to shake hard, but in the end, this product delivers! Kids really love it, I think it is a great gift. I have heard complaints that it doesnt work but it is almost always because the packs are not cold enough or they are not shaking long enough. I have not tried chocolate milk but but I hear it makes a mean frosty.