These molds are great. Spheres turned out perfectly on my very first try! No cracks, just a few small nipples". I did notice they are large enough that. Just one ice sphere per glass is plenty. I poured a 16 oz glass of warm soda over the sphere and my drink was cold in only a few minutes. The silicon is much better than the harder plastic ones make it much easier to remove them from their molds. Our freezer is always full and space is a problem but these fit right in with their small design. Also it's really fun to be able to put whatever you want into your ice spheres. They really class up your
