Be sure to keep your shots covered in the fridge prior to serving, so they don’t form a film on top. The easy way to do this is to buy 2 oz. plastic Jello shot cups that come with lids.

Step 1: Place 16 plastic shot cups (2 oz.) onto a shallow baking sheet that fits into your refrigerator. Step 2: Bring 2 cups of water to a boil in a medium pot.