Product review (5 stars): Clear spheres beat 'on the rocks' for your whiskey of choice
Creating an ice sphere of wonderful symmetry, the Drinkmeister ice mold is extremely easy to use. Fill to the indicated line with water (distiled for a crystal clear sphere!), gently press in the top, and into the freezer it goes. I was pleasantly surprised by the fact that they are made for easy stacking in the freezer, saving space for other items.
Once frozen, all you have to do is run the mold under warm water until the lid loosens. I use a cut glass tumbler with about a 3 inch inside diameter to allow my whiskey enough room to circulate around the ice ball.
Slow to melt, I've found that the Drinkmeister ice mold's ice balls keep my whiskey chilled - but not watered down - to the last sip!