Water Bottle Cozy (Knitted Version) fits a 500 ml water bottle and is made out of one ball of Creme de la Creme cotton with leftovers. It is a very practical and useful item to have when you are hiking, walking, biking etc… as it gives you hands free. Especially in hot climate, I tend to freeze my water bottle so that I can enjoy cold water as it melts while the cozy absorbs the moisture. Everyone loves them. Great gift idea.