Filling my 32l dewar here costs me $23.90. Talking with the guys last time I filled it and they told me they lose more of it than they sell. They told the story of how using it to brand cattle with LN2 instead of hot irons has made a big come back. You have to shave and prepare the spot before using the "cold iron". Eventually the hair grows back, but the hair color is from then on white. Less stress and less chance of infection for the cattle.
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