I tried this with strawberries and it did not come out very well. Decided to try it with raspberries. Used a full 10 oz pack, blended with a bit of water, strained out the chunks, 1/2 cup of sugar, filled the 2 liter about 3/4 full with water, and carbonated it. Still not strong enough flavor wise and needed a bit more sugar, but decent. Went really well with tequila.