Cool cattle info Rick.
And thanks for the invoice.
Airgas charges me $6.50/L here to fill my dewars, but I found an upstart mom and pop welding place that sells to me for $2.00/L.
I have a 25L and a 30L and it seems like a good amount to buy and use before refilling. I occasionally get tempted to pick up another 30-35L dewar (don't want to manhandle a 50L around), but then I think the waste before use numbers would get too high. I'd love to have 160L sitting around.
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It exists!
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