Abstract: A piston for internal combustion engines, having a series of conical openings at the center of each skirt section, each conical opening being horizontally located one to another and each conical opening in one skirt section aligned to another conical opening at the opposite skirt section. Each conical opening is also aligned to an oil drain hole at the oil groove located at the crown of the piston and having the external diameter larger that its internal diameter. Once installed, said conical openings forms an internal storing unit, wherein the oil or lubricant is stored and distributed constantly after being squirted out from the rod bearing to the piston, allowing the formation of a continuous lubricant film, without reducing the strength of the piston structure.