A travel tray and container system includes a base having a cylinder for receiving a beverage container and a tray having a tray shape extending in a horizontal plane to bisect the cylinder to define an upper cylinder and a lower cylinder eccentrically disposed within the horizontal plane. The lower cylinder is dimensioned to closely fit within a cup-holder. The tray has a vertical wall extending around its perimeter, where the upper cylinder and the vertical wall define a tray retention volume having an eccentric cut-out region corresponding to the cylinder. A removable insert has a shape that fits within the tray retention volume, the insert having upper edges configured for attachment of a container-sealing lid.