A shiboridashi (lit. "squeeze out") teapot is like a houhin ("treasure cup"), another traditional Japanese teapot. They’re very easy to mistake for each other, but the difference appears to be in their filter design and lids: a houhin has a distinct strainer built in, and have a deep, bowl-shaped body with a defined lid. Shiboridashis might have small, rake-like filters carved into its bowl body, its lid filtering large leafed teas through a tilting of its lid--some have referenced the Chinese-originating gaiwan as its counterpart.