Everything was eaten eventually, even though there was no dip for the cucumbers.
The blue boxes are Sassy boxes that I bought in the kids aisle at Target. They're also on Amazon and you can probably get them at most places that sell kid stuff. They're really the perfect size for the preschool/early elementary set.
They come with a variety of internal containers, most of which have been scattered, and which I never found hugely useful anyway.
The main downside is that none of the compartments is water tight, so these aren't great for messy things.