As children fired off their Christmas wish lists while perched on "Matt Damon Claus'" lap, the "Bourne Identity" star asked the hopeful kids to consider a present they could keep in their kitchen cupboards: a Water.org bottle.
"If you were stranded on a desert island, would you rather have this water bottle or Justin Bieber," Damon asked a little girl. "Justin Bieber," the girl confidently replied.
But since Damon's red suit, stuffed belly and white beard helped nab the kids' attention, he used the opportunity to share his, and Water.org's, mission to bring potable water to areas in need.
He also told them how $10 from every purchase of the nonprofit's water bottle goes to funding Water.org's initiatives.
"I don't think there's a better gift than this water bottle," Damon said.