This is a simple ammo box for.22 LR ammunition. If you buy bulk ammo that shows up in bags, this box can help you organize your bullets. There is a small lip so they are stackable.

I also added a lid. Also helps with stackability, but is not grooved.

No great shakes here, just something I threw together on Tinkercad, but I wanted to contribute something to the cause.

I use PETG for these, but they'd probably be fine with PLA or SPLA. I like how the transparent PETG makes a translucent box so you can see how many rounds are inside.