These are a wonderful set of ice cube trays in dark blue and purple. They are made of silicone and are flexible but sturdy for the shelves. They make 15 ices cubes that come out in perfect squares that are 1.25 inches in size. They are very simple to use and do not take up a lot of extra space in the freezer. They are also very easy to clean, just throw them right in the dishwasher. I am totally interestes in other products and would recommend these silicone trays to others. I received this product for free in exchange for my complete and honest review.