Make the refresher base: Add the water, mango nectar, sugar, dragonfruit powder, and citric acid to a medium saucepan and heat over low heat. Whisk continuously until the dragonfruit powder and citric acid are dissolved, then remove from heat.
Allow the mixture to cool, then transfer to a large jar with a lid. Once cool, make Glinda's Pink Potion!
Make the strawberry cold foam: Add all the cold foam ingredients to a small mason jar or glass. Froth with a milk frother for 20-30 seconds until pale in color and fully whipped. Set aside.
Make Glinda's Pink Potion: Add ½ cup of the mango dragonfruit refresher base, ½ cup of sweetened coconut milk, and 1 tablespoon freeze-dried dragonfruit (this will make the drink purple) to a cocktail shaker or large mason jar with ice. Secure the lid and shake until well combined.
Strain the refresher drink into a tall glass over ice. Stir in more freeze-dried dragonfruit if desired, then top with strawberry cold foam and pink & green sprinkles if desired. Drink up!
Notes
This makes 2 cups of base, enough for 4 drinks. Store any leftover refresher base in the fridge for up to 1 week.