Molecule

The  is a Custom Shape that upgrades from Custom Shapes.

Design
It looks like a series of identical octagons connected on their cardinal ends. The connectors between them are the exact same width as one of the octagon's sides.

Trivia

 * In code, this is referred to as moleculeBoss and 3,3-diethyl-2,2-dimethylheptane in different places. This indicates this shape was likely indicated for a boss and its appearance is modeled after the stated material.