I picked up the Shark Ice Mold from ZOKU | Live Creatively and it does exactly what it says. The large shark-shaped cubes melt noticeably slower than my regular tray ice, so my whiskey and juices don't get watered down as fast. It's a fun conversation piece at gatherings and works well for cocktails too. Removing the cubes takes a little patience, but nothing major. Good buy if you like your drinks cold without the dilution.