Ví đựng tiền và thẻ tín dụng Gridfinity 1x3x6

I used the Kennetek OpenSCAD parametric model to build this to fit errant credit cards / gift cards while also having a dedicated space for my wallet.

Instead of having it be filled, left an ancillary / additional opening to keep the primary two slots from being too long, no deliberate purpose, but at least it's not closed and allows for additional storage and organization. Maybe pocket change?