It's a logo to depict glue. There is a curved triangle for the point of the glue bottle and three rectangles make up the body. The glue bottle is pointed downward as if in use and is facing to the left.
This is a Glue Filled icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.