Draw a rectangle, we’ll draw the glass with the help of it. You need it to ensure that all the details are even and don’t go beyond the borders.
The oval, which marks the top, is separated by a horizontal line of the rectangle in the center.
The lower oval is not in the center. The most part of it is removed inside the rectangle. It’s necessary in order to connect the parts of the glass correctly. The oval should be smaller than the first one because the glass slightly narrows at the bottom.
Remove the basis carefully in order not to touch the ovals. The figures must be visually on one line.
Connect the ovals with the help of straight lines.
Use a ruler to make the connection lines even.
The inner part of the lower oval is invisible for us. That’s why we should erase it.
The lower part of the glass is much thicker than the walls. Mark it with the help of a curved line.
Draw the walls close to the contours because they are thin.
Connect the walls with the lower part. It’s also possible to use a ruler to avoid the mistakes.
You can draw the water’s line higher and lower.
Draw a glare of light on the water. It will give the volume to the liquid.
Even if it’s not a sparkling water, the bubbles will still appear in a time. Draw them in a random order.
Lower part's details
The light is in the lower part of the glass, that’s why draw a pattern with the help of the curved lines.
Draw the slightly seen lines on the rim of the glass. The rim will seem to be round with their help.
Collage of the stages of the glass drawing