[GFDuke]

Nope. 180L would be the smallest you can rent. The place i get mine from only has 230L Dewars.

[MaadDaawg]

The 5 liter would literally be a waste of money, and I've never seen any for rent under 160L . Problem with renting is they gas off rather quickly so after a week or so it'll be empty even if you don't use it... which would really suck.

e-bay can have some good deals, and a site called LabX will occassionally have dewars for sale.

Good luck