A friend works at a grocery store where it is his job to work milk loads. He can tell you from personal experience that milk jugs are not very strong, and physical abuse can weaken the plastic. Also, when the store gets the milk, usually there's a few leaking due to damaged containers. Definitely some are sold that have weak spots in the plastic but are not leaky.
swim would recommend using glass inside a larger metal or thick non-reactive plastic vessel. Too many horror stories of lye exploding glass containers to not have a backup plan. Hell, SWIM has had his own share of glass breakage, but it was mainly due to heat and only contained salting water with d-limo. Still sucked though, swim lost some actives and a good amount of limo.
Lye is corrosive to glass, it degrades it and adding heat/cool cycles to that where pressure may change too is just asking for problems. SWIM uses CaOH and its a fine base, especially for dryteks where all water is removed and a freebased resin powder is allowed to mix with a NP for maximum surface area. Uses less volume, acids and bases, extracts faster, and there is no risk of spillage of basic water. Maybe d-limo if you're not careful, but that's relatively safe in small amounts as long as you have good ventilation.
Just be smart and know the what-ifs and plan accordingly, you should have no-problems that way.
"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