Didn't mean to be a bit harsh there, just the whole swim thing, is generally, across multiple drug forums, discouraged since it doesn't protect you legally in any manner. Also it makes posts harder to understand. Theres no logical reason for animal representations, or swim, thats my opinion, and from what i can tell the opinion of the majority of the users of the nexus.
And regarding hdpe, its well documented its safe to use as a CONTAINMENT vessel, in the event containment of your main glass extraction vessel is compromised. Though i would use thicker hdpe than a milk jug.
And you can find flasks of all sizes with ground glass tops/caps on ebay, and many other sites that are not chemical/lab supply vendors who may or may not log your info. Ebay is not going to put you on a dea list or anything like that for buying a flask there. Theres tons of legit uses for glass ware, biodiesel, wine/beer brewing, and lots of other legal uses for flasks.
I agree you should not use HDPE for your main extraction vessel. Thick Borosillicate glass, with a glass cap lubricated with an thick food safe oil is the best option here imho.
"let those who have talked to the elves, find each other and band together" -TMK
In a society in which nearly everybody is dominated by somebody else's mind or by a disembodied mind, it becomes increasingly difficult to learn the truth about the activities of governments and corporations, about the quality or value of products, or about the health of one's own place and economy.
In such a society, also, our private economies will depend less upon the private ownership of real, usable property, and more upon property that is institutional and abstract, beyond individual control, such as money, insurance policies, certificates of deposit, stocks, etc. And as our private economies become more abstract, the mutual, free helps and pleasures of family and community life will be supplanted by a kind of displaced citizenship and by commerce with impersonal and self-interested suppliers...
The great enemy of freedom is the alignment of political power with wealth. This alignment destroys the commonwealth - that is, the natural wealth of localities and the local economies of household, neighborhood, and community - and so destroys democracy, of which the commonwealth is the foundation and practical means.” - Wendell Berry