Should You Tip On Pick-Up Orders?

With so many places offering pick-up service for food, should you tip when you made most of the effort to get your order?
Food And Wine asked that question to the etiquette experts at the Emily Post Institute.
They say there is “no obligation” to tip for take out.
The institute does suggest you tip 10 percent for service above and beyond handing you the bag. Those examples include curbside pick-up when you don’t have to leave your car and “large, complicated orders.”
Do you tip at take out? How much?