Why is my V8 V-Fusion bottle building up so much pressure?

Question

I have one of those huge (46oz) bottles of V8 V Fusion pomegranate juice and I drank some of it about 2 months ago. It is about half full and I havent opened it in about a month.

But the thing is, this thing has so much pressure behind it. The lid on it is bubbling up, because of the pressure. and I cant even squeeze the outside of it one bit.

Why is it building up so much pressure? I hope this thing doesn't blow the side of my house off when I open it haha

Answer 1

One word:  fermentation.

I suggest opening it before it DOES explode - preferably outdoors.

Answer 2

Probably because the bottle is filled with bacteria.  The bacteria emits gas as it devours the juice and reproduces.  The extra gas gets trapped in the bottle .  There is nothing you could pay me to open or drink that juice.