GC Electronics Type 44 comes in an industrial size tub, about 2 cups worth, but I think the 2.5 oz tub is most common.
I used to build high-end laser systems, and used it all the time. I've used it at home for years too and have NO complaints.
"Non-contaminating synthetic ester base. Non-silicone base. Smooth white homogeneous paste. Excellent heat transfer. No separation or bleeding."