the longitudinal reinforcement pass around the poles of the tank it is also possible to provide a braid for serving as a longitudinal reinforcement by way of comparison with the prior art the mass of the tank or bottle manufactured in accordance with the last mentioned process is 2 1 kg which roughly corresponds to one third of the mass of a conventional tank 6 kg for the same capacity while maintaining the same pressure resistance the bursting pressure off this tank is greater than 0 6 mpa in the same manner as in the manufacturing process described above the tank obtained thereby can be wrapped with additional protection including a corrugated cardboard container and a fire retardant material another way of manufacturing a tank or bottle includes during the circumferential reinforcing operation replacing the previous glass fiber epoxy resin by a ribbon of glass fibers impregnated with a 2 mm wide and a 0 35 mm thick polyamide 12 in this case the treatment for stabilizing the composition comprising reinforcing fibers consists ln running the product obtained thereby through an air current heated up to 265 u00b0 c over a length sufficient for the resin to melt up to a depth of 0 01 mm the hot air current traverses the surface of the composite already placed in.