'Loaf' in the Bible

Now they had forgotten to take bread, nor had they more than a single loaf with them in the boat;

The cup of blessing, which we bless, does it not mean a joint-participation in the blood of Christ? The loaf of bread which we break, does it not mean a joint-participation in the body of Christ?

Since there is one loaf, we who are many are one body; we, all of us, share in that one loaf.