Better Bottle sides sucked in

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RyeGuy

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Aug 8, 2012
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Has anyone else had a better bottle where the sides get sucked in? I brewed 10 gal of a DFH punkin clone two weeks ago. Put about a gallon inside a pumpkin to ferment then transferred to a BB after 4 days. Now the sides are sucked in on it. I'm wondering if the large amount of headspace has anything to do with it?
 
Did you move it from somewhere warm to somewhere cold? What do you have on top that would seal so well that the bottle would collapse? I would think an airlock or blowoff tube would just suck water in instead of collapsing the bottle.
 
Nope, been in my bathtub the whole time. I've got a three pice airlock inserted in a stopper. The airlock still has water in it too.
 
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