Been surfing around and found some stuff.
First a picture:
View attachment 182817
A bit of text:
The Tomato shaped pipe, often referred to as a Ball, is the most beefy pipe found in the Apple family. The Tomato, famous for its huge girth and bold size, is a favorite among artisan pipe carvers. With a large surface area, there is plenty of room to finish and design the Tomato pipe anyway the carver wants. This often results in many modifications of the classic shape guidelines. Sometimes, if the Tomato shape is compressed, the carver will decide to name it a Squashed Tomato.