It seems to be this pending patent for "Container, closure, and methods for manufacture" which contains many diagrams of the design https://patents.google.com/p

It seems to be this pending patent for "Container, closure, and methods for manufacture" which contains many diagrams of the design https://patents.google.com/patent/US20220204224A1/en https://patents.google.com/patent/US20220204224A1/en Fig. 4 especially points out the flow/direction of ketchup and air.