The MasterFormat 22 - Plumbing sections shown below include manufacturers and associations on Sweets that provide information and resources about general project requirements, performance requirements, general product requirements such as delivery and storage, trade associations, reference standards, construction aids, software licensing ...
One cup is eight ounces, so four cups is equal to 32 ounces.
I would measure the pasta (dry) in 1/4 cup (which is 2 oz.) and couldn't believe how little it was. Then one day I decided to try weighing it and realized that 2 oz. of the rotini I was using was more like 3/4 cup dry. However, due to its shape, I'm sure elbows would fit in a smaller cup.