I think some of the dissent in the comments fail to consider some of the nuances in this interaction. If this specific kind gesture isn't appealing I have two alternatives to suggest.

I keep a bunch of bottles of water in my backseat and two in my glovebox to hand out to people asking for help at traffic lights and such.

Goodwill and other thrift stores generally have books for pretty cheap. Easy to fill a shopping bag for $20. I mostly aim for beginner level novels and young adult fiction and put them in the free neighborhood libraries. Satan knows we need more children reading.