Collapsible container for liquids and the like

1. A collapsible container ( 1 ) for liquids and the like, comprising:

two deformable membranes ( 2 ) placed side by side along an intermediate plane ( 2 a ), said deformable membranes ( 2 ) comprising:

a plurality of mutually bound edges ( 3 ) able to define a housing volume for liquids and,

an aperture ( 4 ) made of two mutually unbound edges and able to make an inlet for said liquids, said deformable membranes ( 2 ) defining:

a rest configuration in which said two deformable membranes ( 2 ) are close to the mutual contact along said intermediate plane ( 2 a ), and

a working configuration in which said two deformable membranes ( 2 ) are elastically deformed and form an arrow in a direction of mutual removal, by defining a containment volume for liquids and the like,

and wherein said membranes ( 2 ) define in a view perpendicular to said intermediate plane ( 2 ) and parallel to said aperture ( 4 ) and in said rest configuration, two convex segments of which said convexity being facilitated by a step ( 3 a ) present at said edges ( 3 ),

and wherein said step ( 3 a ) has a shape of an arrow, both in a rest and working configuration, defined by a portions of said two membranes ( 2 ) adjacent to said welded edges ( 3 ),

and wherein said collapsible container ( 1 ) comprises: a groove at the center of said collapsible container ( 1 ), at said aperture ( 4 ), able to further increase the concavity of said deformable membranes ( 2 ) and to form a folding line for a working configuration;

and wherein said deformable membranes ( 2 ) have a shape tapering from said aperture ( 4 ) to an opposed end ( 5 ),

and in which said aperture ( 4 ) is opposed to a top edge ( 3 ) which defines a bottom of said collapsible container ( 1 ), said container ( 1 ) having along said intermediate plane ( 2 a ) a triangular shape with an edge ( 3 ) made of a curved top, so as to connect the two oblique sides of said triangular shape;

and wherein said a working configuration is attained when a user holds with one hand said container ( 1 ) at its edges ( 3 ), and said hand is exerting a deformation movement, substantially parallel to said intermediate plane ( 2 a ) and to said aperture ( 4 ), using elastic deformation of said membranes ( 2 ) to achieve said working configuration of said container ( 1 );

and wherein said rest configuration is attained when a user

stops exerting a deforming force, so that said membranes ( 2 ) are free to release a stored energy of said elastic deformation, by returning consequently said container 1 in a rest configuration;

and wherein said two convex segments have a mutual maximum separation comprised between 1 and 3 mm. to allow the collapsible container to contain a liquid even in a rest configuration and facilitate the moving in opposite directions of said convex segments when both edges ( 3 ) are squeezed using only one hand.

2. The collapsible container ( 1 ) according to claim 1 , wherein said aperture ( 4 ) is formed by a linear segment and made of two mutually unbound edges and able to form an inlet for said liquids.

3. The collapsible container ( 1 ) according to claim 1 , substantially without a bottom or support base to an outer surface.

4. The collapsible container ( 1 ) according to claim 1 , further comprising, at said aperture ( 4 ), handles for inserting a collar or a similar support.

5. The collapsible container ( 1 ) according to claim 1 , wherein said membranes ( 2 ) are made of a polymeric, thermoplastic material.

6. The collapsible container ( 1 ) according to claim 1 , wherein said membranes ( 2 ) are mutually bound by thermal welding.