U sure? What you want is some jugs of "pure-lab" LN, you can get it at any medical school.. Carefull i still have "Cold-burns" from LN
You can buy the stuff at pretty much any welding supply shop. I bought some and put it in a stainless steel thermos, which was an approved container. About $9. I'm sure your aware but consider this stuff molten lava.
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