Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Would these work for storing standard Quart canning jars?  I am looking for something to replace old boxes, and would like to store them by the dozen.
Document: The 18 quart container is roomy enough to store crafts, painting rollers, and miscellaneous household/garage items, yet is small enough that I can stack them and fit into my bookcases or garage shelving units. No more looking into cardboard boxes for what I need. And, after storing them in the garage, I am not finding any bugs or dampness in them either. I have these storage boxes labeled, so everything is organized and easy to find.
We ended up ordering 12 to get our &#34;basement stuff&#34; out of cardboard boxes and into something that would be both a little more protective and we could tell what was in the box w/out opening it. These just plain work.The only thing we dont like is the lids aren't really up to stacking. If you fill your boxes tight, this isn't a problem as the contents will suport boxes placed on top.
I bought these for storing old belongings to keep in an outdoor shed. All my paper related belongings have deteriorated some as a result of not being air tight. The handle locks are not air tight and DO NOT SEAL as the product appears to. I was able to tell this in the beginning but thought it wouldn't be an issue. If you are storing more solid like items then it may work but not ideal for paper or any anything similar.
This is a sturdy storage box- no doubt about that. But I was expecting something larger in size for storing my winter clothes and blankets. This turned out to be very small and it is difficult to gauge the size from the description and photo. Later I went to Target and found larger see-through boxes for much less- for 7 $ each.
I do like these very much. I store things that go on my closet shelves - purses, scarves, gloves, etc - in these. No need to label the box, you can see what is in these just by looking while still on the shelves and then pull out the correct one. These make being organized easy.
These are great for storing larger than shoe box size, but when you're not in need of a huge bin. they are clear so that you see inside of them. I tape an index card on the inside facing out so that I can ID things at a glance. I also like the latch closure. I have about 50 of these at a store that I own.
Also, in my linen closet, for storing extra products until I'm ready to use them, like shampoo, toothpaste, lotions, really, you could store just about anything in them (I have some important papers I want to have at hand in them too). You can stack them too. And I really like the locking handles, makes it perfect. I'm so glad they came in a box of 6! I know I'll being purchasing more of these.
I personally and using these boxes to store clothing and they work really well. They are just the right size and stack nicely. They came very quickly---shipping is fast. The price is right. I looked everywhere in the stores and could not find this size but here is was on Amazon inexpensive and easy to obtain.
These containers work so well for my book storage. I bought them earlier this month, and have filled them already. Since my temporary storage area is not air conditioned, and I am now living in Florida, I also bought desiccant packs to include. I love the fact that I can see through these boxes. With books in them, I can still lift them, which would be a concern with larger boxes. The latches are very sturdy, but easy to close.
We use these boxes at work to store projects that we are working on, and they make organization so easy!
Answer: I have the 30 qt size and have loaded a picture with two qt jars sitting in the corners so you can see the bottom is NOT flat at all.  Also mine starts off 9.5" wide at the bottom and widens to 10.5", and the length at the narrowest (where the handles are) begins at 14" and widens to just shy of 15".  I use mine for craft & clothing storage and love them.  But these containers aren't squared off in any way at the bottom or at the corners.  On the other hand, they stack beautifully.