Homemade, cheap, simple, lasts a long time.
Here is the original recipe I start with: How to Make a Homemade Electrolyte Drink - Mary’s Nest
It’s just three types of salt:
I used the proportions in the recipe above for my base electrolyte powder, then I add
Mix it all together and store in an airtight container. If you have issues with clumping, store in the freezer.
To use: Add 1/2 teaspoon of the mix to ~20 ounces of water. I like to add lemon or lime juice as well. Add a few drops of sweetener if desired.