How much bacteria will grow in a bottle of Lemonade?

I bought a 1L bottle of Lemonade, the other day. The bottle is made out of plastic and I drank straight from it. My question is, how many bacteria would have grown in the bottle today, two days later. This Lemonade contains sugar, though very little, however. Does the sourness of the Lemon juice withhold the bacteria to develop in normal speed or is the same as with everything else. Also, I wonder if it is dangerous in any way to drink straight out of the container generally amongst beverages, over let’s say the period of a week?

Kindly, S.