Method for forming container

An improved method of forming a double wall container, comprising the steps of:

• laminating a thermoplastic resin sheet for a container mainbody and a water-absorbing breathable non-woven fabric sheet for an inner body with a low-melting adhesive, said non-woven fabric sheet being formed of bonded fibers having a length longer than 5 mm and a basic weight in the range of from 15 to 50 g/m.sup.2, heating the laminate sheet at a forming temperature, feeding the heated laminate sheet between a male mold and a female mold arranged with a certain space therebetween in a forming zone with the container main body sheet facing the female mold and the inner body sheet facing the male mold, clamping the edges of said laminate sheet with the female mold and the male mold, and separating the container main body sheet and the breathable inner body sheet to a prescribed distance from each other by the combination of the application of vacuum suction through the female mold and the application of air pressure through the male mold, said air pressure passing through said breathable non-woven fabric sheet.