In my effort to practice creating objects with shapes I made a lot of varied fluid containers. Some of these were done from observation and some were from imagination.
Vase drawn with construction shapes, with the added component of some cross contours
The beer bottle I did from observation
A glass I drew from observation.
Pitcher drawn with construction shapes
left bottle is without using construction shapes. The right bottle is with construction lines.
A wine glass has more complex construction shapes with cross contours as well.