This tray makes four large ice spheres, ideal for the slow dilution of stiff cocktails. By W&P. 

Crafts 4 perfect 2.5" spheres — the surface area makes the cube slow-melting, keeping drinks ice-cold and not diluted
Sloped internal molds create seamless spheres and rigid connecting pins secure the tray during filling, transfer and freezing.
Great for festive chilling in pitchers and punch bowls
Lid keeps ice fresh and eliminates freezer odors
Easy to fill from the top, while a convenient side hole prevents overfilling for a perfect sphere every time