Extensible container with screw cap

Abstract

Expandable container, made up of a cylindrical container ( 1 ), of the type of a soda can, closed at the bottom and open at the top comprising on its outer upper part a thread ( 2 ) that will serve to seal the container hermetically by means of a cap ( 4 ) and towards the inside a small flange ( 3 ) along its entire perimeter, where the screw cap ( 4 ) has an internal thread ( 5 ) inside, to screw with the external thread of the container ( 2 ), and an elastic seal ( 6 ) on the upper part of the inner part that will confer tightness to the assembly when the cap is properly tightened; the extensible part is made up of a mobile inner cylinder ( 7 ), with a diameter slightly smaller than that of the container, which has a straight perimeter outer flange ( 8 ) on its upper edge, which will rest on the top of the container ( 1 ), and another flange ( 9 ) on its lower edge curved towards the outside that supports the interior wall of the container ( 1 ) and that said curved flange ( 9 ) carries an elastic joint ( 10 ) inside; and when the mobile inner cylinder ( 7 ) slides upwards, it does so until the elastic joint ( 10 ) located inside the lower flange ( 9 ) abuts the lower part of the circular flange ( 3 ), the assembly being watertight in that area; and when the mobile inner cylinder ( 7 ) is unfolded, the volume of the assembly is increased, so that to the liquid ( 11 ) contained in the container another complementary liquid and even some ice can be added, increasing the volumetric level from level ( 13 ) to level ( 14 ).

1 . Extendable container with screw in cap comprising:
 a cylindrical container ( 1 ), of a soda can type, closed at the bottom and open at the top, with
 a thread ( 2 ) on the outside that it will serve to seal the container 
 a small tab ( 3 ) inside the container ( 1 ) and along its entire perimeter 
   a screw in cap ( 4 ) that has
 an internal thread inside ( 5 ), to screw with the external thread of the container ( 2 ), and 
 an elastic joint ( 6 ) in its upper part on the inner part; 
   a mobile inner cylinder ( 7 ) that constitutes the extensible part of the assembly, located inside the container ( 1 ), with a diameter slightly smaller than that of the container ( 1 ) and presenting:
 a straight perimeter outer flange ( 8 ) located on the inner cylinder's ( 7 ) upper edge which will rest on the upper part of the container ( 1 ), 
 a second flange ( 9 ) on its lower edge curved towards the outside that supports the interior wall of the container ( 1 ) 
 an elastic joint ( 10 ) placed inside said curved flange ( 9 ) 
   
     
     
         2 . The container described in  claim 1  wherein when the mobile inner cylinder ( 7 ) slides upwards, it does so until the elastic joint ( 10 ) located inside the lower flange ( 9 ) comes to a stop with the lower part of the circular flange ( 3 ), leaving the assembly watertight in this area. 
     
     
         3 . The container described in  claim 1  wherein when the mobile inner cylinder ( 7 ) is unfolded, the volume of the assembly is expanded, so that to a liquid ( 11 ) contained in the container another liquid or complementary elements can be added, increasing the capacity of the assembly from level ( 13 ) level ( 14 ).