Originally Posted by Budzu
...Anytime you leave out something sweet, there is always something wild and disgusting that will find it.
Dunno about that...
I left a plastic bottle of starter wort on my workbench open for a few hours. Closed the lid and thought 'I'll wash it out later'. A week later I come back and see a half empty bottle of wort on my bench, give it squeeze and feel it's built up pressure. I loosened the lid and let-it-be.
Turns out the 'yeast' flocc'd pretty well, smells a funky in a good way and tastes alright. It's either wild yeast or brett I think.
The only thing I'm wondering now is if it's safe to drink. I know no pathenogens can live in beer but I'm assuming wort is a different story.