Best labware caps according to redditors

We found 9 Reddit comments discussing the best labware caps. We ranked the 4 resulting products by number of redditors who mentioned them. Here are the top 20.

1. Phenolic Cone Lined Caps 2oz (20/400) (Pack of 12)

2 mentions
Phenolic Cone Lined Caps 2oz (20/400) (Pack of 12)
2oz Cap (20/400)Phenolic Cone Line Cap12 pcs
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2. 100 New CAPS ONLY for Preforms/Soda Bottles

2 mentions
100 New CAPS ONLY for Preforms/Soda Bottles
We cannot honor tax exemptions.
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3. Lab Glass Stopper 24/40 5PCS

1 mention
Lab Glass Stopper 24/40 5PCS
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4. Wheaton 239259 Black Phenolic Screw Cap with PE Poly-Seal Liner, 28-400 Size (Pack of 144)

1 mention
Wheaton 239259 Black Phenolic Screw Cap with PE Poly-Seal Liner, 28-400 Size (Pack of 144)
Black phenolic screw capPoly-Seal liner is manufactured from low density polyethyleneUnique cone liner design offers superior torque retention and excellent sealing characteristicsIt is recommended that liner be tested prior to use for leak resistant applications
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Top Reddit comments about Labware Caps:

u/jtfarabee · 6 pointsr/Homebrewing

Those bottles are called a Boston Round. Not sure if there's a better source for the caps, but Amazon has them for $0.39/each (if you buy 12 dozen of them.)

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https://www.amazon.com/Wheaton-239259-Phenolic-Poly-Seal-28-400/dp/B003FSU30Q/ref=sr_1_10?ie=UTF8&qid=1541540394&sr=8-10&keywords=boston+round+caps

u/Reinheitsgebot43 · 4 pointsr/Homebrewing

This is what I do. I fill the preform with 50% yeast from a starter that I’ve overbuilt and then top it off with a 50/50 solution of wort/food grade glycerin.

For management I slant 4 preforms for every new yeast I get. One goes to my Homebrew buddy who only uses dry yeast, one gets a different color cap, two get white caps and all labeled with month/date created and on the cap labeled with just the yeast info.

When I want to make a stater I pull out the preform two days before I’d normally would (they take longer to get started).

I still wash a yeast if I think I’ll use it within the year and it’ll go in the fridge in a mason jar.

Once I get to my last preform (different colored cap) I re-overbuild that yeast and restart.

u/csheets88 · 4 pointsr/ScotchSwap

https://www.amazon.com/dp/B00TR1QYJO

u/buckydean · 3 pointsr/ScotchSwap

That is exactly how I wash all my boston rounds. I want everything that comes my way to get a thorough washing, and I know a lot of people here are weird about soap. I fill up a big pot with water, with the boston rounds standing up inside, then put it on the stove and let it boil. Like u/FlavSec says, I just turn it off when it gets violent and they start clinking.

While those are boiling I let the caps all soak in hot water, and maybe switch out the water a few times to keep it hot. I find the caps are the ones that still retain a faint peat smell sometimes, so I will either only reuse those for peated Scotch, or if it's bad enough I have a bag of caps and would just replace it. I think the bag of caps is good to have anyway, to replace a broken one or those shitty flat gasket ones.

https://www.amazon.com/gp/product/B00TR1QYJO/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

u/Davec433 · 1 pointr/Homebrewing

Like u/fuckernaut said soda preforms. You can reuse the preform and buy replacement caps. I’ve also though about using 4 oz mason jars since everything is reusable.

u/tedgerto · 1 pointr/trees

safe as it was new. just a protip, you can pickup a 'cork' that fits the 14mm joint size easily, to avoid needing rubberbands etc...

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https://420life.com/product/glass-stopper/

https://www.amazon.com/Lab-Glass-Stopper-24-5PCS/dp/B01M9BU6Y3