This Grid-It organizer is fantastic

I bought a bigger one (Grid-It Organizer, Black (CPG10BK)) for my backpack and loved it, I had to have more

but I love the GRID-IT

I love the Grid-It organizer

and it's like the grid-it was made for my bag

I love this Cocoon GRID-IT organizer

I only regret not buying a bigger one -- very little downside, and it's a bit cramped.