Abstract: A temperature-retaining device includes an upper wall and a lower wall. The upper wall includes a conduction plate having a top surface and a bottom surface comprising a plurality of downwardly projecting fingers. A temperature-retaining body is disposed in contact with the plurality of fingers to transfer heat from the temperature-retaining body to the conduction plate. A support structure is coupled to the upper wall and has a peripheral wall surrounding the temperature-retaining body. A lower wall is coupled to the support structure to enclose the temperature-retaining body within a cavity defined by the upper wall, support structure and lower wall. The lower wall comprises a gas-permeable channel that is substantially impermeable to liquids.

Abstract: Autonomous and lightweight vehicle intended to transport a city dweller combined with the use of public transportation. Formed by one motorized wheel on which the user maintains, through speed, his or her lateral balance, and longitudinal balance is ensured by automatic functioning driven by an accelerometer. The footrests and the guide supports that tightly hold the leg are retractable. Driving does not require the use of the hands. The entire device goes into a bag, e.g. a backpack, and weighs less than 4 kg.

Abstract: A temperature-retaining device comprises an upper wall and a lower wall. The upper wall comprises a conduction plate having a top surface and a bottom surface comprising a plurality of downwardly projecting fingers. A temperature-retaining body is disposed in contact with the plurality of fingers to transfer heat from the temperature-retaining body to the conduction plate. A support structure is coupled to the upper wall and comprises a peripheral wall surrounding the temperature-retaining body. A lower wall is coupled to the support structure to enclose the temperature-retaining body within a cavity defined by the upper wall, support structure and lower wall. The lower wall comprises a gas-permeable channel that is substantially impermeable to liquids.

Abstract: Autonomous and lightweight vehicle intended to transport a city dweller combined with the use of public transportation. Formed by one motorized wheel on which the user maintains, through speed, his or her lateral balance, and longitudinal balance is ensured by automatic functioning driven by an accelerometer. The footrests and the guide supports that tightly hold the leg are retractable. Driving does not require the use of the hands. The entire device goes into a bag, e.g. a backpack, and weighs less than 4 kg.