I can't believe some people are using this for guacamole and other wet items. (However, I must add that the photos of the food in the container only show dry food.)The bottom of the plunger is perforated so any gunk that touches the lid will get into the inner workings of the plunger! And there are a lot of inner workings on this plunger. There is the bottom plastic shell, an inner o-ring that is very hard to remove, the outer sealing flange, the top cap/handle and two umbrella valves. Because tSee full review