Perfect for use in all sizes of Better Bottles as well as the 2000ml Erlenmeyer flask. Top diameter 1 15/16". Bottom diameter 1 5/8".
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I bought this to go with the 2L Erlenmeyer Flask for a yeast starter with a stir plate. Turns out you do NOT want to use a stopper with an airlock when propagating yeast this way. Hope this info helps somebody else. 5 Stars because it does what it says, but I may never use it.
Feb 6, 2015 | By Brandon