Experimentando Blender

From left to right: 1st: Set of points linked together to make the side silhouette, then using screw modifier and solidify modifier and subsurface modifier. 2nd and 3rd: Cilinder adjusted to fit the widths of the glass cups, with subsurf and solidify 4th: Curve silhouette, with screw modifier, subsurf and solidify. Reference image:  https://www.instagram.com/p/BueMYycA4yo/