In John chapter six Jesus declares many times that he is the bread of life that comes down from heaven, from the Father. In a lengthy discourse, Jesus establishes two main things: 1) The Father gives the true bread, 2) Jesus, himself, is that bread.
Jesus then said to them, “Truly, truly, I say to you, it was not Moses who gave you the bread from heaven, but my Father gives you the true bread from heaven. For the bread of God is he who comes down from heaven and gives life to the world.” They said to him, “Sir, give us this bread always.” Jesus said to them, “I am the bread of life... - John 6:32-35a
Within the realm of typology the Manna is seen as the type (foreshadowing) and Jesus as the anti-type (actuality). This seems borne out as Jesus acknowledges that the Father gave the bread in Exodus but that he, himself, is the "true" bread. The contrast appears not to be between true and false but between shadow and reality, if you will.
Later, in John 15, Jesus declares that he is the "true" vine:
I am the true vine, and my Father is the vinedresser. - John 15:1
The context of chapter 15, however, doesn't offer a similarly explicit contrast. Assuming the adjective "true" represents a contrast and taking "true vine" as the anti-type (actuality), what is the vine that is the type (foreshadowing)?