ISB ~ 1 Corinthians 10 v16

cup of blessing:The traditional name for the third ritual cup of wine consumed at the Jewish Passover meal. It is this cup that Jesus blessed and consecrated at the Passover of the Last Supper and made the eucharistic cup of the New Covenant (11:25; CCC 1334, 1340).

participation:Eucharistic Communion unites believers with Christ and with one another. These two blessings are related inasmuch as the Sacrament of Christ’s Body and Blood is what continues to mold us into the ecclesial Body of Christ, the Church (10:17).