THE LD SERIES DEWARS: For safe, convenient storage of liquid nitrogen in your laboratory or work area. For the safe, convenient storage of liquid nitrogen in small quantities, there is a complete line of Dewars incorporating the same modern design and quality construction as Taylor-Wharton Refrigerators. These sturdy, yet lightweight, Dewars combine optimum holding time with convenient access to liquid nitrogen. Our line of cryogenic Dewars includes a beaker-style model for wide-mouth access to liquid nitrogen, and a pitcher-style model to facilitate transfer. 2.5 inch neck diameter. 50L Liquid Nitrogen capacity. 0.41 L/day evapoaration rate.