That's true, but my friend is asking me, "Can they be used like a debit card, or maybe my Starbucks card that I can add more money to when it gets low?"
It is a
Bitcoin address. But, there is a trust factor involved with paper wallets. Once the private key has been imported to a client, this trust is gone.
In short: Yes, you can reload them, but no one would accept it, since the key has been added to a client.