Not bought them yet, but going to go search ebay and find the best deal on at least one, hopefully a small job lot of small (and better yet, if possible both small and intermediate sized, say from 100-250 and 500ml) erlenmeyer flasks (the conical type with a wide mouth and flat bottom), ideally with a vacuum takeoff adapter built in although I can live without that by using a still head and if I want a thermometer in there as well a claisen adapter and/or claisen head (the former has a single male ground glass joint leading to a small length of glass interposed between a short column with a female joint at the top and at the bottom, it diverges into a U-shape with another straight wide tube with another female joint, so as to allow the adaptation of a single-necked flask to serve the purpose of a 2-necked one, such as for inserting a thermometer and a distillation head, whilst a claisen head has a single connection to the flask, an upper bore for a thermometer, addition funnel (like my rather nice pressure-equalized one that still works with a stopper in the top that can be used for addition of solutions/suspensions of air-sensitive and/or pyrophoric or just generically volatile and nasty reagents without exposure to air, after inert gas purging:)) and an downward-angled male joint for attaching condensers, similar to the claisen adapter but integrated for distillations) although I do have 2- and 3-necked flasks when I wish to use them. No 4-necked ones yet, but I haven't actually ever needed to use one. Of course I plan to add some to my lab arsenal but thats just me. Once I start window-shopping for lab supplies I just can't stop myself, I'm like a teen prep girl in a designer clothes store and can't help myself but to slaver over the prospect of updating my gear, and stocking the shelves with yet more reagents and solvents (although generally in the latter case I'll be buying things for my immediate and short-term future desires and requirements, but I'm not immune to knowing a good deal when I spot one and snagging something that I don't need right this moment, but will come in handy in the future. Last shopping trip of that kind, grabbed a liter of methyl cyanide on that basis because I just KNOW it will come in mighty useful (its a solvent, polar, but unlike alcohols, water etc. its aprotic, meaning it can be used for many reactions that need things that won't dissolve in nonpolars but cannot be used in media capable of being deprotonated under the reaction conditions. In this respect it has more in common with acetone (although this is fairly reactive due to the carbonyl group which would interfere with quite a lot of processes, or with DMSO (dimethyl sulfoxide, notable for its medical and vetinary use on sore joints, nontoxic, if clean, but has a remarkable ability to penetrate skin extremely quickly, carrying anything dissolved in it with it. Which could be a good thing [E.g transdermal drug delivery systems] or extremely bad, if it were containing something such as corrosives or poisonous chemicals, spill it on you and it'll go straight in] and with DMF, NMP and HMPA [dimethylformamide, N-methylpyrrolidone and hexamethylphosphoramide] and methyl cyanide/acetonitrile is similar to these, with many solvent and the odd reactant use, and unlike, barring acetone and other low-boiling ketonic solvents like methyl ethyl ketone, MIBK (methylisobutyl ketone) it has a respectably low boiling point, below that of water, whilst the likes of DMF, and particularly DMSO have really high BPs, needing a GOOD vacuum pump to distill them off after use, so does HMPA, although its not a solvent I'd want to be exposed to if at all possible, its got a nickname of 'liquid cancer', and is, unsurprisingly carcinogenic, causing nasal cancers in particular. The sort of thing I'd keep on the shelf in reserve for perhaps the odd use if something really had to be done in HMPA and wouldn't tolerate DMSO, MeCN, DMF etc.
Need some Erlenmeyer flasks, its one of the few basic common pieces of kit I actually am lacking in, I only have one, and its not suitable for small-scale applications since its a dirty great big bugger, a 2.5 liter vacuum filtration flask that has a huge neck (intended for taking one or more rubber/elastic polymer shim collars that narrow it down to take various sizes of Buchner filtration funnels and allow a good vacuum seal.
So I want and have just enough money left to get at least one, hopefully 2-3 small Erlenmeyers, for distillations, etc. that are more suitable than the whopper I have. That does admirably at the task intended, but isn't suited for distilling small quantities of liquids.