An antenna for a portable communication apparatus has a radiator with first and second ends, the first end being connected to radio circuitry in the portable communication apparatus. The adhesive system has an outer pressure sensitive adhesive material, an inner pressure sensitive adhesive material, a bonding adhesive material, and at least one spacer material. The apparatus comprises an expandable container wherein the pressure and temperature of the reaction causes the container to expand and contract to control the degree of immersion of a fuel cartridge in water and consequently to control the intensity and duration of the reaction. The local power point optimizer may adjust the operating condition of the group to the optimum operating condition by modulating a transistor, such as by pulse width modulation, to electrically connect and disconnect the group from the installation. Embodiments of the invention further prevent dropping of beverage containers by retaining the beverage container in a swiveling device that holds the beverage container securely while the beverage is being consumed. Upon receipt of a power control command from the control device, the power-control determination section determines as to power-onpower-off in units of a block, and performs power control on the basis of a result of the determination.