Collapsible container for liquids and the like

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

• two deformable membranes (2) placed side by side along an intermediate plane (2a), 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 (2a), 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 (3a) present at said edges (3),
• and wherein said step (3a) 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 (2a) 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 (2a) 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.