DetailsBreathable foam stoppers will withstand boiling or autoclaving temperatures, making them ideal for use in preparing a yeast starter. Fits1000 ml flasks.
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5.0 / 5.04 ReviewsGreat for yeast startersThis stopper is great for for yeast starter flasks. Mine both discolored but a simple wash in sanitizer keeps them in good condition.February 1, 2014Great for startersThis foam stopper is a perfect fit for my 1 liter Erlenmeyer flask. Why waste foil when you can get one of these for less than a buck, and use it again and again?October 16, 2013Upgrade from tin foilI have been making yeast starters for over a year and have been using tin foil for the top of my flask. I upgraded to the foam stopper last weekend and man I love these things. I should have spent the pennies a year ago. So much nicer and definately a more sanitary fit in the top of the flask.March 21, 2013
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