In need of a way to organize and store my Lego obsession, I made a bunch of acrylic boxes which not only hold Legos, but also stack and interlock similarly: Each brick box holds 64+ of the same-shape piece. So the 1×1 box will hold 64 1×1 bricks, and the 2×2 holds 64 2×2 bricks. The larger ones hold a few more due to how the sizing works out. The 1×1 box is 40mm per side (external dimensions).
Clever way to store LEGOs.