Homemade soda

It has been unseasonably warm around here lately, not that I am complaining or anything. This recipe from My darling lemon thyme sure would wet my whistle in the bestest of ways...if only I could find mulberries around here. I'm not even sure I have ever tasted one but they sure to look scrumptious. Made with very little effort and interchangeable berry options, this fizzy drink would be perfect for these last few days of warm don't you think? I think. What are your favorite recipes to stay cool on warm days?

image by my darling lemon thyme