There are two wine glasses that appear to be half full and there is a line coming out of the top to depict clinking of the glasses as when people "cheers" or "salud" each other.
This Champagne 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 5,700 icons, all in the same style and quality.