phasetwo’s Liquid Withdrawal Device LWD is used to conveniently transfer liquid nitrogen from the D25, D35, and D50 dewars into smaller vessels and receptacles. The LWD locks into the quick assemble/disassemble flange that is attached to the neck of these dewars; the spring plunger attached to the flange locks the device onto the dewar. In a filled dewar, liquid nitrogen evaporation will maintain sufficient pressure to dispense liquid from the LWD.