Child resistant overcap for oval container

A child resistant overcap and container device, which comprises:

• a.) a container having a round neck for attachment of a cap, and having a hollow body, a portion of said hollow body being an upper body, adjacent said round neck, said upper body having a non-circular footprint with a front and a back and opposing sides, said upper body having a predetermined width as measured from side to side, and a predetermined depth as measured from front to back, wherein said predetermined width is greater than said predetermined depth;
• b.) a collar permanently attached to said round neck, said collar having an open, central circular portion about said round neck, said central circular portion having front and back and opposing sides, said collar having a pair of opposite shoulders extending outwardly from said central circular portion and above said shoulders of said upper body of said container, said collar having one of at least one J-slot and at least one J-slot tracking protrusion located on at least one of its front and back;
• c.) a cap removably attachable to said round neck of said container;
• d.) an overcap having a front and a back and opposing sides, and having a hollow inside, and having an outside footprint substantially corresponding to said footprint of said upper body of said container, said overcap, relative to said collar, having the other of at least one J-slot and at least one J-slot tracking protrusion located in at least one of said front and said back;
• wherein a user may create a child resistant closure by pushing said overcap downwardly on said collar with said overcap front in alignment so is to cause movement of at least one J-slot for locking engagement thereof wherein said opposite shoulders of said collar push upwardly against said overcap to maintain J-slot and protrusion engagement, and wherein said overcap is removed by complex motion of pushing downwardly and rotating and then lifting upwardly.