Big Mama LN2 Dewar arrival party E6850 + Gigabyte X38 + Corsair PC10K = 5.35Ghz 2D/3D

[Timbosan]

left the dewar for 8-9 days and after checking the level i only saw about 1-1.5cm LN2 drop

that's pretty good
really happy with that actually

thats not bad, here at work we have large 200L dewars of LN2, and also the smaller ones like yours. The smaller ones (if the stopper is good) will hold for ~2 weeks with ~1cm drop. Yours is not bad though.

And yes its better to not let it be fully emptied and warm up - even just a cm or 2 in the bottom - heating/cooling stress isnt good for the inner lining.