Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pōtĭlis, e, adj. [poto], that pertains to drinking, drinking- (ante- and post-class.): potilis nidus, a drinking-vessel, Varr. ap. Non. 145, 4: raptus, a drawing in when drinking, sipping, Cael. Aur. Tard. 5, 10, 119: aërem recipere atque reddere haustu potili, id. ib. 3, 8, 123.