It's a Truncated Octahedron, and a planter. 
You can stack them! Hooray!!

Stackable Planter

This hexagon might not be the bestagon, but it certainly triesagon

Was originally intended to hold sunglasses, repurposed into a drawer organizer

Has 2 screw holes... for screws

Multipurpose Hexagon

This hexagon might not be the bestagon, but it certainly triesagon

This was originally intended to hold sunglasses, repurposed into a drawer organizer

Has 2 screw holes... for screws

Multipurpose Hexagon.stl

For mounting devices under desktops, shelves, etc. 

Supports devices around 21.5mm thick.

Turn Pin Mount 21.5mm

For mounting devices under desktops, shelves, etc. 

Supports devices around 30mm thick.

Turn Pin Mount 215.stl

Mounting Hooks 30mm

Convenient foot-lift mechanism that fits most baby gates

Fits gates with these dimensions:
Bottom Square Bar ≈ 14 x 14mm
Vertical Rod (Diameter) ≈ 10mm

Has a channel for zip ties to hold 2 pieces together

Baby Gate Foot Lift

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Seedling

Debutant

Stackable Planter

Multipurpose Hexagon

Turn Pin Mount 21.5mm

Mounting Hooks 30mm

Baby Gate Foot Lift