Transport device with an inner container

A transport device (10), comprising

• a) a first section of an outer container comprising a shell on an inside of the outer container, the shell having the shape of a spherical cap with an inner diameter and an opening, wherein the opening of the spherical cap faces upwards,
• b) an inner container having an upper section a lower section and an inner hollow volume defined thereby, wherein at least the lower section has a spherical shape on the outside, the outer diameter of which is smaller than the inner diameter of the spherical cap of the outer container,
• c) the inner container being suitable to be arranged in the spherical cap of the outer container in a freely pivotable fashion,
• d) the inner container capable of accommodating a payload, and
• e) a liquid,
• wherein the inner container is designed in such way that by receiving a payload, the inner container and payload have a combined center of gravity that is arranged eccentrically and below the inner container's rotational center,
• wherein an interstice is defined between the inner diameter of the spherical cap of the first section of the outer container and the outer diameter of the spherical shape of the inner container,
• wherein the liquid is disposed in said interstice,
• wherein the inner container has a lower specific weight than said liquid, wherein the inner container floats on said liquid.