Well S-Style-S,

Now that a little more information has been provided. I will now try to answer you original question even though your still holding back on us.

My assumption? You'll get less than an ounce.

Yes you holding back! What type if any ventalation do you have? Plants need fresh air added and stall air removed. That means at least two fans. "The pH is in a good area"? Wish I knew what that meant.

A 2 liter bottle as a pot and you want a big yield? Let me tell you something. You want big buds then you need big roots.

You want big buds you need more light after harvest and drying then it will be all clear that you have started an great hobby but you have to step up if you want more after three months of waiting.

Loco