For hummingbirds, I make 4 cups at a time and microwave it for 8 minutes. (dunno why 8 mins but it works). the best press: never had a problem. water, vodka and a bit of Sta Flo. Again, I make 4 cups and put in small drink bottles. It is then kept in fridge....no mold or anything! I pour some in small mist bottles to use.