I order groceries through Pea Pod and/or Fresh Direct. There's a payment option where you can include a tip. For those of you who use/have used this service, do you tip? If so, how much? I polled Twitter but only got two responses (fail!). Someone said they don't and the other person said a couple dollars.

I usually spend $100ish every 2 weeks. I live on a fourth floor walk up (they only make one trip to bring everything up). Very rarely does the order include heavy items - out of the past 3 orders, I ordered a case of water once, usually 1-2 2 liters of soda each order, but that's really it. I've been tipping $2-3 but don't know if that's not enough or what.