I have one of these for re-xing, it works very well. I think its ~25ml or something, not that exact kind, but the same design from a different supplier.
http://www.scilabware.co...ighing-bottles/p-15-122/You can also take a look at reagent jars which also have wide mouth gong lids. Take a bit of veggie/sunflower oil and smear it around the joint to get an airtight seal before putting it in the freezer to prevent naptha/heptane vapor leakage, or water vapor contamination/condensation.
They're pretty cheap if you look on ebay.
Here's a pic of the one i have-
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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