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Versatile stopper that fits our Y70 Yeast Starter Bottle and anything else that uses a #7 stopper. 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 as a simple airlock for our Siphonless Fermenter - just replace
the 5.5 stopper and airlock with this stopper. No need to worry about water
levels.
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