feasible minimum similarly for example to the thickness of a milk bag the bottle base 2 and its upper part 4 which includes neck 5 and cup 7 are made of a more thick and solid material the result of this structure is a kind of a developed bag with a solid base and solid upper part in order to attribute strength and stability to the bottle 39 s wall i e to envelope 3 a hollow extractable pipe like sleeve 10 is inserted through the bottle 39 s neck 5 and reaches the bottle 39 s base 2 this hollow sleeve 10 includes on its external circumference on it 39 s upper part an external threading 11 which is intended to be threaded to the internal threading 12 created inside the bottle 39 s neck 5 the hollow sleeve 10 with its threading 11 is inserted into the bottle 39 s neck until its internal end 13 arrives nearer to the bottle 39 s base 2 in this situation the beginning of the external threading 11 of sleeve 10 comes in contact with the beginning of the internal threading 12 in the bottle 39 s neck 5 rotation of the hollow sleeve 10 drives the external threading 11 with it external circumference of the upper part of the hollow sleeve 10 into the internal threading 12 in the bottle 39 s neck threading of the hollow sleeve 10 causes the internal part 13 to get closer to the bottle base 2 and further come in contact with it and enter the suitable depression 14 which is.