Tobias operated a service station on a road near the Canadian border. As a favor to customers, he frequently stored, without charge, certain items that travelers preferred not to take into Canada. Ronda had planned to cross the border for a day's visit but did not wish to take with her a several bolts of fabric she had in her car. She left the fabric with Tobias, saying she would pick it up later that day. Tobias stacked them on a shelf under the counter and an employee accidently spilled his drink on them. Will Tobias be liable for the damage?