The calabash or Bottle gourd  is a vine grown for its fruit, which can either be harvested young and used as a vegetable or harvested mature, dried, and used as a bottle, utensil, or pipe. For this reason, one of the calabash subspecies is known as the bottle gourd. The fresh fruit has a light green smooth skin and a white flesh. However the rounder varieties are called Calabash gourds whereas the longer and slimmer kinds are usually well known as Bottle gourds.

In Tanzania, the pulp coated seeds of the Calabash are known as buyu (singular)/mabuyu (plural). These sour pulp coated seeds are gently cooked with sugar and coloured with food colouring and sold as sweets in coastal towns.

In Arabic it is called qara. The tender young gourd is cooked as a summer squash.
Additionally, the gourd can be dried out and used to smoke pipe tobacco. A typical design yielded by this squash is recognized in (theatrically) the pipe of Sherlock Holmes. But Doyle never mentions Holmes using a calabash pipe. It was the preferred pipe for stage actors portraying Holmes, because they could balance this pipe better than other styles while delivering their lines.

Hollowed out and dried calabashes are a very typical utensil in households across West Africa. They are used to clean rice, carry water and also as food containers. Smaller sizes are used as bowls to drink palm-wine. Calabashes are used by some musicians in making the kora (a harp-lute), xalam/ngoni (a lute) and the goje (a traditional fiddle). They also serve as resonators on the balafon (West African marimba). The calabash is also used in making the shegureh (a Sierra Leonean women's rattle) and balangi (a Sierra Leonean type of balafon) musical instruments. Sometimes, large calabashes are simply hollowed, dried and used as percussion instruments, especially by Fulani, Songhai, Gur-speaking and Hausa peoples. In Nigeria, the calabash has been used to avoid a law requiring the wearing of a helmet on a motorcycle.