As long as you're reselling actual KFC products, you are not likely violating their trademark. However, if you deceive the customer into thinking they are buying directly from KFC, then you likely are.
In a similar situation, Ferrari has often attempted to keep independent repair shops from using the Ferrari name and logo to advertise that they service Ferrari cars. They've lost quite a few times.
All that said, you can still run into copyright issues when reproducing somebody's logo.
Not sure, who would pay the bill for the food poisoning?
If you are reselling my food am I still responsible for it?
Say you heat the container on your bike to a danger zone temperature. Say the order sits at the bottom but you have the same order on top. The food at the bottom could sit there all day.
In a similar situation, Ferrari has often attempted to keep independent repair shops from using the Ferrari name and logo to advertise that they service Ferrari cars. They've lost quite a few times.
All that said, you can still run into copyright issues when reproducing somebody's logo.