Abstract: Containers for beverages, e.g. cans for soft drinks are provided with a tubular lever arranged on the top part of the can. The lever (L) is mounted with possibility to pivot and once pivoted to pierce by its one extremity (17) the can's top and to perforate it. The piercing extremity (17) is connected to a flexible extension (38) protruding into the can and through which the content of the container can be consumed. In one of the embodiments the extension (38) is formed as folded tubular member made of plastic material. Once the can is perforated the extension is capable to unfold and fall into the can so as to approach the beverage and to allow its consumption.

Abstract: An installation for generating utilizable energy from potential energy is disclosed. The invention comprises a first swivel plate pivotally mounted within a roadway, a second swivel plate spaced from the roadway, transmission means operatively connecting the first and second swivel plates, and fluid fille containers adapted to be compressed.