This is the Klepsydra icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
It's a logo of an Hourglass, reduced to an image of an Hourglass. An Hourglass looks like the two wine cups held together without their stems in opposite directions. After the glass there is something to hold the matter in place in order to tell time.