00:00Ok, quick test. Grab a plastic beaker, pour in near boiling water, and watch the walls go soft
00:06and slump. Plastic starts giving up around 70-100 degrees. Borosilicate glass basically shrugs.
00:15So I went through the listings and picked out the best deals on flasks that handle real heat.
00:20First up, the round bottom boiling flask, 50-2000 milliliters, with a 24-29 standard ground neck.
00:28Under $5, 4.43, and nearly 5,000 people already bought one. That ground joint is the real win,
00:35it mates straight with a condenser or thermometer adapter, so you can run an actual reflux setup
00:40instead of jury-rigging it with rubber stoppers. Borosilicate, so a burner flame is fine.
00:47Next, this Erlenmeyer with the black screw cap, 50-250 milliliters, about $8.
00:53The screw cap is what I like. A rubber stopper pops off the second something starts boiling,
00:59and where does that land? On your bench, or worse. This one stays put. Pour, swirl, cap it, walk away.
01:09Solid 4.6 rating from over 4,000 buyers. Now the Kjeldl Flask Long Neck Round Bottom,
01:17GG17 Borosilicate, up to a liter, around 8.68. GG17 means thicker walls than standard glass,
01:24so it holds up longer under the burner, and that long neck is built for digestion runs
01:28and nitrogen testing. This one has the lowest rating here at 4.2, but it's the most specialized
01:34piece in the group. If you're doing Kjeldl Digests, this is the one that survives.
01:39This DXY conical flask comes in clear or amber with GL45, GL32, and GL25 screw caps,
01:4750-1000 milliliters, and it's 6.48 cheapest of the screw cap group. The amber version is the
01:53sleeper pick. Storing light-sensitive stuff? That protection is something clear glass won't give
02:00you. And it still takes heat. 5 stars, close to 3,000 sold. Last one, triangular Erlenmeyer
02:09with black screw cap, 50-250 milliliters, 8.31. Yeah, it's shaped like a flask, but the flat base
02:17and angled walls make swirling way easier, no liquid climbing the sides and jumping out the top.
02:22Same borosilicate, same heat resistance, 4.7 stars. If you mix a lot, this shape actually earns its keep.
02:31Links for all of these are in the description, prices included.
02:35If this saved you from melting a beaker, hit like and subscribe, I'll keep hunting down good lab gear.
