The icon is a depiction of 3 cubes with one stacked on top of two of them. The cubes have a Diagonal line running through them from upper left to lower right.
This Sugar Free 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.