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Versatile stopper that fits our Yeast Starter Bottle E71. Use as an airlock
for yeast culturing, and even more useful as a sterile shield when preparing
media. The proprietary foam is heat-resistant, and will withstand autoclaving or
pressure cooking, making it an ideal flask plug when preparing sterile wort and
agar. The honeycomb structure of the foam lets the plugged flask breathe, yet
bacteria and wild yeast are filtered out and cannot reach the media. This means
you can put your media in an Erlenmeyer flask, plug with a Foam Stopper, and
pressure cook to sterilize, fully confident that bacteria and wild yeast will
not enter the flask, even during the cooling and later storage period outside
the pressure cooker.
Also great to use as an airlock for a 5 or 6½ gallon carboy. Just replace
your stopper and airlock with the foam stopper.
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