I really wanted to love these little trays. I'm doing all homemade baby food for my youngest child and really wanted a good system for safely and neatly freezing and storing batches of purees. I liked the look of these and was glad to see they came with a lid (NOT airtight, but better than nothing) for easy stacking in the freezer and for limiting the food's exposure to air. I ordered two. BOTH of those original two arrived with tiny (pinhead size) holes in them, one in each tray, as well as a pencil-eraser sized weak spot, where the silicon was thinner, in one section of one of the trays. Amazon has some of the best customer service around and made the exchange for two more super easy, even upgrading me free of charge to next day shipping so I'd have them quick. The next two that arrived were perfect, at least in terms of being hole free. I made a batch of puree and tried them out...when it came time for popping the frozen cubes out to store in freezer bags, I was disappointed to find that they didn't really "pop" out at all. In fact, they were stuck pretty fast in there. It took running the bottom of the tray under warm water to release them. That isn't so much extra effort, but I had really hoped that the silicon would just release the cubes cleanly without any trouble so that I could keep the entire amount totally frozen until needed.
I haven't tried any other baby food storage trays, so I have nothing to compare these to. I question whether they'll hold up well over the long term and I hope that they will. I do like their form factor and it is great to have something I know won't leach chemicals or something in my baby's food. I love the convenience of grabbing a few cubes from the freezer to microwave for baby's dinner--just as easy as opening a jar from the store and a lot cheaper & better for baby.
In conclusion: If you decide to give these a try, inspect your trays thoroughly for holes and weak spots before using. In something that stores pureed food or liquid, hole = MESS. And if you have a baby, you probably have enough of those to deal with already. Also expect to have to dunk the bottom or run it under warm water to release the cubes.
EDIT 3/14/11: Well, I've been using these trays regularly for a number of months and they've held up well. Not only that, but I've discovered that letting the frozen trays sit on the counter just 5 minutes or so makes popping the cubes out a snap! Changing my rating to 4 stars.
I've been making baby food for about a month, and I've been freezing it (as it is recommended for longer storage) and this cube tray has made my life much easier!
I've used this AND regular ice cube trays. When you have crying in the background the last thing you really want is to be trying to get frozen baby food from an ice cube tray (the food wouldn't budge out of the regular ice cube tray at all; I nearly threw it out the window in frustration). Luckily for me these silicone cube trays are extremely flexible and the food comes right out.
The fact that you can stack them when full, compared to the ice cube trays, is also helpful when you have very little space in your freezer. No mess under the tray = no mess in your freezer either.
I had originally purchased one; but since I'm making quite a bit of food, I've since placed an order for three more.
Volume wise it holds about the same volume of a stage 1 food jar.
NOTE: the lid WILL NOT make a perfect seal, but it protects the food from any spills you might have and helps you stack them. While some people might be turned off by that, I'm okay with that since I'm making mostly purees that will be used within two weeks. I don't think the product would be as great if the seal would be perfect as the lid would very likely be difficult to get out.
Edit: I just measured, each of the 9 cubes will hold 2 liquid ounces of food.
It looks like these are mostly used to freeze home-made baby food, but that's really neglecting another fantastic use of them... making the perfect ice for boozy drinks! Using fewer but larger ice cubes means less surface area, so less melted water in your drink. The wife and I have also used these to freeze juice to use as ice cubes for an incredibly boozy, light-your-own-hair-on-fire tiki drinks. I'm sure there are also a myriad of other adult beverage uses that we haven't thought of.
It's pretty easy to clean and the ice is also more easily retrieved out of than a different cube tray we had and got frustrated with. If you get a stubborn one, just grab a butter knife and loosen up the four side, then push from the bottom.
I bought this tray because it's cheaper than the Beaba brand tray. And the reviews made it sound like the food easily pops out. After freezing some pureed peas in it, I had a really hard time getting it out of the tray. I thought the food would come out easily, but no such luck. I had to run it under hot water until the edges defrosted a little and then push the frozen puree out by turning the tray inside out. Wasn't as easy as I had anticipated it to be and my hands got really cold from dealing with the frozen tray for some time. I popped out all the food and stored them in a plastic bag, like ice cubes. There was no way I could get just one out at a time.
The cover doesn't seal like a Tupperware would, where you would feel confident that if it dropped or fell over, that the cover wouldn't pop off and the contents spill out. The cover is pretty solid, so you could easily stack a few of these trays on top of each other. That wasn't a big deal to me though. But if you're concerned about odors getting into the food, then it'll probably be a problem for you.
I'm actually really disappointed in this tray, although I'll continue to use it because having frozen cubes of food on hand is still convenient.