PreparaEvak Fresh Saver Plastic Food Storage, Small/Short, Black

I use this for one thing: storing guacamole. I put the leftover guac in this, push the lid down, which seals the guac off from air. The next day, the guac is still great. No brown at all. Use some, put the lid back down, the guac stays perfect. I keep guac in it for several days, with no browning.UPDATE: I just learned how to clean out the top. I thought the little arrows on it were telling you to rotate it while pressing down on the food, but they were to show you how to take the top apart for cleaning. Duh! After using, you take apart the top and clean it by hand. If you don't, old food gunk stays in there.LATER UPDATE: I'm on my third one of these. I dropped and broke one of them. What happened to the other one was that at some point I lost one of the two small blue valves inside the top. Apparently, they can come off and disappear during washing if you are not careful. When I lost the first one, I just covered the hole with a little piece of duct tape and that actually worked fine. But then I lost the second valve and the container stopped blocking air very well. So, I suggest keeping an eye on those two little valves--as well as the loose round rubber seal which is also in there--when you are washing out the top.

I bought this specifically for guac. It works great. Be careful and gently ease the lid down until it fully displaces all the air; stop as soon as you see the tiniest bit of guac squish past the gasket and go up the sides (that tiny bit will get brown but so what, it's an extremely small amount). The gasket is very soft, so if you press too hard you will get an explosion of guac up the sides and maybe even out of the container. So don't do that. You'll need to take the lid apart for cleaning: all the separate pieces, including the gasket and valve covers (little blue disks). It's much easier to clean with a brush than a sponge, so at first I thought it was a pain but now it's a snap. The lid is not dishwasher safe (plus you're gonna lose those valve covers) so take the 60 seconds to wash by hand.I don't know how durable this will be; I don't expect the gasket to last very long given how soft it is, but at this price it's worth it. I also bought a larger size for coffee. Since it's clear, for coffee you need to store it away from light (so not on the counter) but no big deal.

This product actually works very well - better than plastic wrap, lime juice, etc. It's also reasonably easy to disassemble and clean. However, based on the type of plastic and wall thickness, I don't expect this to last long without developing a fatal crack that ruins the sealing capability. The other issue is the geometry of the container. Ideally, you'd like to whip this out of the fridge or cooler and serve it immediately. However, it's rather tall and narrow which makes it awkward to reach in for a dip once it is less than 2/3 full. That means you'll need to carry along and additional bowl for serving if you take this to a picnic/BBQ party.

The plan is to use this with whole coffee beans. I knew from the start that it's clear plastic so you need to keep the container out of the light. Either stick it in the cupboard or cover the container with something opaque like paint or foil tape(duct tape is usually translucent).One thing i noticed is that the lid can be taken apart for cleaning. Simply grab the top and bottom in different hands and twist counter clockwise to unlock.From here I noticed that theres actually two one way valves in both directions that create the vacuum effect. I'm not sure if it makes a huge differences but i went ahead and made it so both of the large ends were on inside. Very easy to do. This makes it harder to open but makes me more confident in it being air tight.I'm happy with my purchase at less than $15. If you're not cheap like me, you might as well spend extra on the Airscape which looks better all around for coffee storage, but costs more than double.

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 this product is so complicated, cleaning would take at least 15 minutes and half of my drying rack. Because of that I would only use this for something that is dry and non powdery. Maybe it would would be good for whole coffee beans, rice, and chips. Not flour, leftovers, or the such.Also beware when reassembling the cap (after cleaning the insides for instance) make sure to completely rotate the two halfs together. If they are not completely closed the air will easily bypass the two umbrella valves and you will not get any sealing at all.Lastly, I asked previous customers how hard it was to lift the plunger. People were quick to tell me that anyone could easily do it. I found the initial lifting hard and unsatisfying. It took about 4x force to initially move the plunger because the cup seal has to invert before the plunger can move. Furthermore, the whole plunger is able to wobble enough that the seal can be completely lost and the cup seal can be completely mashed!I think this is an innovative product, and you are certainly getting a lot of technology for your money, but I find this to be a gimmick at best

This thing is surprisingly effective at keeping our crackers fresh for weeks. I was intrigued by the design - it has valves so that as you close it or open it, a little rubber valve allows the air through, so you can open or close it. But, when it's at rest, those valves are closed, so the moisture doesn't flow through, and the crackers stay crisp. Quite ingenious.