This icon looks just like an old style glass milk bottle. The base is made of a rectangle with rounded corners that tapers to a narrow neck. On top of the neck are two circles meant to represent the mouth of the bottle.
This Milk Bottle 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.