This is pretty simple. One thing, pretty much all stores and liquor stores should have some version of sweet and sour. These are really great for Mai Tais, Margaritas, and Long Island Ice Teas. However, it's difficult to find in places outside of Europe. So, here's how to make it on your own.
All right, remember the other post with the Simple Syrup syrup mix? Well, all you do now is take an equal amount of the simple syrup and match it with lemon juice. Yup! Lemon Juice. To add a bit more volume, fullness, and an interesting taste. Use an egg white or two and stir it up really nicely!
That's pretty much it!!! Take a look at a visual below: