This shit has been discussed ad nauseum in the past, and the conclusions were always the same!
Being the swell guy that I am, I'm gonna give you some top secret information: we even have a pimp as fuck toolbox to retrieve all that stuff!
Here it is!
https://www.the-hive.ws/forum/searchx.pl?Cat= (https://www.the-hive.ws/forum/searchx.pl?Cat=)
You will be able to find all kinds of cool stuff there. So please keep it to yourself, do not share this source with anyone!
Oh yeah, almost forgot to give you some free search results regarding the stupidity of using flat bottomed glassware! Here it is!
Post 89079 (missing)
(bliss: "flat versus round bottom flasks", Chemicals & Equipment) Post 104748 (missing)
(Somaz: "Flat-bottomed flasks under vacuum?", Chemistry Discourse) Post 198900 (missing)
(reflux: "vac bomb", Newbee Forum) Post 305676 (missing)
(chem_123: "Sass. distillation setup", Newbee Forum) and many more
I'm not fat just horizontally disproportionate.