Prepare the boba pearls according to the package directions.
Add the sugar and lemon juice to the prepared boba and stir to combine. Allow to sit so the boba can soak up the flavors.
Swamp Water Rum
Pour the um into a measuring cup with a spout. Split apart the B2 capsule and sprinkle a small amount of the powder into the rum. (A little goes a very long way.) Stir to combine, the rum will be a bright almost neon yellow.
Add the food coloring to the rum and mix until the rum is a dark, mossy green color.
Swamp Water Shots
Place a funnel into the top of a test tube. Pour in the pink cranberry juice and then the swamp water rum. Add the boba pearls (they'll sink to the bottom). Repeat with the remaining ingredients
Top each test tube with a lid and store in the fridge until ready to serve. (The boba should be consumed within a few hours of preparing.)
Notes
This recipe can easily be doubled or tripled to serve a crowd. If you don't want to use test tubes, you can make these shots in shooter glasses (at least 3.5 oz).
If you can't find pink cranberry juice cocktail, white cran-strawberry juice will work too.