Since they have a drawer-like action to open them, I felt that these would be put to even better use by stacking them up and securing with double sided tape to make mini sets of drawers. You can make them tall and thin or even tall and wide (by taping them side by side and on top of each other) depending on what sized work space you have to fit them on.
You can even customise your drawers to fit in with your room décor by using things like gems, stuck on with glue (if you want to 'bling' them up), or even wallpaper samples that you can get for free from most DIY stores.
I'll quite possibly be doing this on the tops of the 'drawer' sets, just to hide the Feel Unique branding (although as far as brandings goes, it actually isn't hideous), or over the top and down the 2 sides - but I haven't 100% decided on this yet, hence my wallpaper piece is only slightly stuck on to show you the rough idea!
You could store make-up, make-up brushes (brilliant to keep any household dust etc away from them), nail tools, jewellery, cotton wool products and god knows what else in them, so long as it fit in then the list of possibilities is endless.
This is such a low cost alternative to Muji-like storage (which can work out as being too expensive for some) as they really do the same job, just without the ability to see into the box without opening it - a small price to pay if you're on a budget.
Apologies for my photographs, it was dark when I managed to get supplies together to show you as much of a step by step as possible, so there's a tinge of yellow from the lamp we have in the room, and when using full flash, the boxes looked odd and I'm only just learning about bouncing the flash, so this is my first public attempt haha.
Is this something you have considered/would consider doing with your boxes?