The "shipped" icon is a plain, black and white box truck. The truck is facing to the right so only 2 wheels can be seen. It has a check mark on the trailer portion of the truck.
This Shipped icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.