Learn French: L'invité apporte une bouteille de vin. - The guest brings a bottle of wine.

In French, apporter is used for bringing inanimate things you can carry, like une bouteille de vin. If the guest were bringing another person to the party, you would use amène instead.

Why is it bouteille de vin and not bouteille du vin?

After expressions of quantity, like une bouteille (a bottle), un verre (a glass), or beaucoup (a lot), you always use the simple word de instead of du, de la, or des.

Since we are learning the verb offrir in this lesson, could I say offre instead of apporte?

Yes, but the meaning changes slightly. L'invité apporte simply means he physically brings the bottle with him. If you say L'invité offre une bouteille, it specifically emphasizes that he is presenting the bottle as a gift to the host. Because offrir takes regular -er endings, the form offre would fit perfectly here grammatically.

Does the word L'invité tell us if the guest is a man or a woman?