You should never use jars. They are not meant to experience heat like that. They will crack/break and you will cry. Buy a beaker set on amazon. It’s like $30. Pyrex is best, borosilicate (I think I spelled that right) is acceptable.
Even the Pyrex media bottles are not 100% safe to use. If they have a hairline crack it’s much harder to see.
This photo was sent to me by a guy I was coaching a bit.
What are you using to homogenize for small test batches? I’m looking for something that’ll produce more accurate results over a mag stirrer but can’t use something as large as the x1000D homogenizer for batches that small.
i have a cheap homogenizer w/ a small 10mm wide cutter head that I use w/ the small 50ml beakers. I use about 25ml of disty so the glass is .5 full. I find that running it slow, 1-2K RPM, keeps the bubbles out as well as spraying a little bit of argon (slowly, don’t blow the oil out - def has happened). Once i put it in my cart farmer i backfill w/ Argon again and push em out.