Chaser Jigger. Make Whiskey Stand on Water (or Beer, or Soda, etc) in This One of A Kind Shot Glass.  Impress Your Friends But Be Careful, Won't Take But A Few of These to Make You Think YOU Can Stand On Water!! 
 
This glass proves that whiskey does stand on water! First, fill the bottom bowl to the neck with water. Then, fill as much whiskey as you prefer in the top bowl. The two liquids do not mix until the glass is tilted far enough to allow the water to flow from the bottom bowl to the top! This whiskey on water glass is the perfect single glass for serving a shot with chaser all in one. Mouth-blown glass. The bottom compartment holds 4 ounces of water while the top holds 2 ounce of whiskey. The two will not mix until the glass is tipped. The glass is decorated with the straight Jack Daniel's logo. Official Licensed Product.