The carrier has an automatic self-locking bottom construction which is actuated simply by placing a beverage or other container onto a bottom panel which traverses the whole width of the bottom and causes one or more tabs to snap into slots to perform the locking function. Special covered auxiliary containers which slip down over the upstanding handle of the carrier are provided for carrying donuts, rolls, pizza slices, sandwiches, or other food items, together with beverages in the carrier. Preferably, the container is made to be oven-proof so that the food items can be heated in the trays before mounting the trays on the carriers. The food items can be stored in the covered trays safely before distribution so as to speed the distribution process.