Bag for liquids, pastes, or granulates and method of manufacturing

A bag comprising:

• a front wall, a rear wall and two side walls demarcating an inside of the bag receptive of liquids, powders, pastes or granulates and when full having a sealable top portion and a substantially flat rectangular base at a bottom portion thereof upon which the bag stands,
• wherein the front and rear walls each have bottom edges and the side walls each have a bottom edge having a given length and sealed to the bottom edge of the front wall along half of the given length and sealed to the bottom edge of the rear wall along half of the given length and wherein remaining portions of the bottom edges of the front and rear walls are sealed together,
• whereby when empty, the two halves of the bottom edge of each side wall along with portions of the bottom edges of the front and rear walls to which the halves are sealed are freely bendable toward and away from each other, such that the side walls are infoldable with the two halves of the bottom edge of each side wall bent toward each other to permit the walls to lie substantially flat and
• wherein as the bag is filled, the side walls are outfolded with the two halves of the bottom edge of each side wall along with portions of the bottom edges of the front and rear walls to which the halves are sealed, automatically bend away from each other and bottom portions of the side walls automatically fold under the bag and form the base upon which the bag stands.