In a small saucepan, combine the water and honey over low heat until water is just warmed and honey is thoroughly dissolved.
Take the pan off the heat and add the lemon juice and whey (or probiotic powder).
In a blender, combine 1 cup of the liquid with the mint leaves and blend for 1 minute or until smooth.
Set up your flip-top bottle with the funnel and sieve on top, then pour in the mint-infused liquid as well as the remaining honey lemon water to fill the bottle, leaving 1 inch of airspace at the top of the bottle. Cap the bottle and let sit out on the countertop for 2 days or until slightly effervescent.
Transfer to the fridge and serve over ice.
