You can cut a retort pouch along the perforation to open the pouch.
After cutting the perforation, you can put the pouch into the fridge by closing the pouch by mating the protruding line and groove on the pouch.
My question is whether the protruding line and groove are called "zipper"?
Can I say, "Close the zipper and put the pouch into the fridge."
I believe that it's a description of one of those plastic bags that is used to store food in the fridge. The closing mechanism is a thin strip of plastic at the top, which fits neatly into a slot on the other side of the bag, creating an airtight seal.
I admit that I have absolutely no idea what that mechanism is called but I don't believe it's a zip(per).