Poma (G4188) comes from pino (to drink) and refers to any drink or beverage. Used only twice in the NT — 1 Corinthians 10:4 ('and all drank the same spiritual drink [poma]') and Hebrews 9:10 ('regulations for the body dealing with foods and drinks [poma]') — the word carries significant theological weight in the Corinthian passage, where Paul identifies the 'spiritual drink' of Israel in the wilderness as Christ Himself.
The theology of poma in 1 Corinthians 10:4 is typological Christology at its most explicit: 'They all drank the same spiritual drink, for they drank from the spiritual Rock that followed them, and the Rock was Christ.' Paul identifies the water from the rock (Exod 17:6, Num 20:11) as a prefiguring of Christ. Every drink from that rock was a foretaste of the Living Water (John 4:10-14, 7:37-39). The Eucharistic cup echoes this: every time we drink the cup of the Lord (1 Cor 11:26), we drink the same spiritual poma — the life of Christ poured out for us. 'If anyone thirsts, let him come to me and drink' (John 7:37).