CHALICE, the cup used in the celebration of the Eucharist (q.v.). For the various forms which the chalice so used has taken, see DRINKING-VESSELS. The ancient custom of mixing water with wine in the Eucharistic service, practised from early times in both Eastern (except the Armenian) and Western Churches, is known as that of the "mixed chalice." The practice has been generally discontinued since the Reformation in the English Church, but is not illegal if it is not done ceremonially (Martin v. Mackonochie, 1868, L.R. 2 P.C. 365; Read v. Bp. of Lincoln, 1892, A.C. 664).