Please i need the answer for this ASAP

Alice has an expensive gift that she wants to mail to Bob. However, there are some problems:

1. Alice and Bob live in a world where every package sent through the mail without a lock gets stolen

2. Alice and Bob each have an infinite number of locks, but Alice doesn’t have a key to any of Bob’s locks, and Bob doesn’t have a key to any of Alice’s locks.

3. Fortunately, a package can have more than one lock on it at a time.

How can Alice get the gift to Bob so that he is able to get it out of the package, but it won’t be stolen in the mail?