Packaging containers of plastic; plastic containers for the delivery of food or beverage from restaurants or stores, including delivery or carry-out items; rigid plastic packing containers; plastic single layer or multi-layer rigid plastic packing containers for the protection, preservation, and insulation of food or beverage during delivery from restaurants or stores, including containers for delivery and carry-out; flexible plastic containers for the food industry; plastic single layer or multi-layer flexible plastic containers for the protection, preservation, and insulation of food or beverage during delivery from restaurants or stores, including containers for delivery or carry-out; packaging containers of plastic for maintaining freshness, integrity, and temperature of food or beverage products during delivery from restaurant or store to another location; container systems for food delivery, namely, systems with individual plastic containers for storing and protecting food, and outer containers or bags for storing and insulating the individual plastic containers