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Foam Stopper (Autoclavable)

Foam Stopper (Autoclavable)

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Description

Reusable, non-absorbent, white foam stoppers provide a snug fit, yet allow free airflow. Ideal for Erlenmeyer flasks when propogating yeast cultures. 

  • Autoclavable up to 249°F (121°C)
  • Fits 35-45mm inner diameter openings in graduated cylinders, tubes, and flasks
  • Easily manipulated - springs back to original shape after use
  • Resists alcohols, bases, esters, and dilute acids
Community Q&A

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Browse 1 question Browse 1 question and 29 answers
Why did you choose this?
MoreFlavor Store
Going to use a yeast starter for my next batch
Joshua P on Jan 12, 2021
breathing release yeast
Gary Sanger on Sep 22, 2020
Going to use a yeast starter for my next batch
Joshua P on Jan 12, 2021
Need it for yeast starting
Harold N on Nov 19, 2020
breathing release yeast
Gary Sanger on Sep 22, 2020
Stopper for my yeast starter flask
Orion K on Aug 27, 2020
yeast starter
David San C on Jul 28, 2020
I make a lot of starters, but but typically use tin foil
Horst Sprader on Jul 4, 2020
Starters
Pete T on Jun 9, 2020
Need for flask
Winfrey J on May 28, 2020
Better than tinfoil
Drewbrewski on May 28, 2020
Making yeast starter
Myles F on May 20, 2020
need it to make beer
Valued C on May 13, 2020
old one is getting scuzzy looking
Eric M on May 9, 2020
For Erlenmeyer flask; while using stir plate
Kerry Shaver on Apr 25, 2020
For Erlenmeyer flask.
Kimberly on Apr 21, 2020
Hopefully will work well with flasks
Roy Westerberg on Mar 17, 2020
My other one was "eaten" by prolonged exposure to sanitizer.
David O on Mar 12, 2020
good price
Marco a L on Feb 25, 2020
Better than nothing
Steven L on Feb 7, 2020
Very useful product for yeast starter flasks.
Douglas B. on Feb 1, 2020
Recommended with Flask
Dale Z on Jan 16, 2020
for making yeast starter
Hyungsoo K on Jan 10, 2020
To fit flask, for making starters
Roy Westerberg on Jan 8, 2020
It works with the yeast starter kit
Aaron C on Dec 13, 2019
I like this is reusable and can be autoclaved to sanitation.
Nelson L on Dec 2, 2019
Homebrew
Mike on Nov 18, 2019
For starter flask, old one is ragged
Steve C on Nov 16, 2019
Other one got mold
Allen R on Nov 6, 2019
Friend recommended
Kim O on Oct 15, 2019
My old ones are, well. . .old.
Ian on Oct 3, 2019
Need it for yeast starting
Harold N on Nov 19, 2020
Stopper for my yeast starter flask
Orion K on Aug 27, 2020
Reviews

4.9 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
9
1
0
0
0
Rated 5 out of 5
Does the job as expected
These stoppers do the job as advertised
January 7, 2021
Purchased
1 month ago
Rated 5 out of 5
Perfect stopper for starter flask
Only used once, but perfect fit on 2000 ml starter flask.
January 2, 2021
Purchased
1 month ago
Rated 5 out of 5
Yeast starter last minute
I tried this with soy venting sanitized jug and had too watch very careful LOL pay’s to have right stuff. (was out aluminum foil)
October 5, 2020
Purchased
4 months ago
Rated 5 out of 5
Works as advertised.
July 8, 2020
Purchased
7 months ago
Rated 5 out of 5
Great little stopper
My starter flask just loves her new foam stopper, so spongy, easy to sanitize, and sooo comfortable. Can’t wait for those little yeasty’s to try to get out as there’re in for a big surprise.
Defying gravity
Defying gravity
June 16, 2020
Purchased
8 months ago
Rated 5 out of 5
Does the job
Does the job as the stir plate spins away.
June 5, 2020
Purchased
1 year ago
Rated 4 out of 5
Fit my 2000 ml Flask perfect!
It fit my 2000 ml Erlenmeyer Flask from my local brew supply just fine. The only reason I knocked off a star is because I got a little wort on it when swirling the flask; and that caused it to stick to the inside of the neck. Upon removing it to pitch my starter, I noticed a tiny bit of foam peeled off and was stuck to the glass. I did cold crash and decant the yeast, so it was in my flask for 2 days total. The residue/foam was easy to remove from the flask and I really can't see where any is missing on the stopper itself. So I'd say the durability is still quite good, but I just wished it hadn't peeled off so easily. In the end it's probably my fault, and I wouldn't hesitate to buy again.
May 29, 2020
Purchased
8 months ago
Rated 5 out of 5
Foam stoppers
Making yeast starters is much simpler when using the foam stoppers. Using aluminum foil works but the stoppers are much more convenient.
May 14, 2020
Purchased
9 months ago
Rated 5 out of 5
Worked as described. Used with yeast starter.
April 26, 2020
Purchased
9 months ago
Rated 5 out of 5
foam stopper
worked well on my flask with propper yeast starter.
November 3, 2019
Purchased
1 year ago