Not a fan of the stack-n-sort trays
I think this is the first item from SBC of which I'm not a fan for these reasons: They don't have lids and they don't snap together. Be sure to pick it up by the bottom one. I had pieces from 2 projects all over the place! You may also need to purchase an additional set, depending on how many you need and whether or not you are comfortable using the top one without a cover. So if you're going to need 4, you'll have to order 3 packs of 2 trays instead of 2 so you have a "lid". Personally, I prefer to have the top one covered. They are very well made, but they're too easy to tip over if they're pushed or bumped. I would recommend these to a friend, depending on how they intend to use them.