Ghiraula, sponge gourd.
Binomial name Luffa aegyptiaca.
Also called smooth luffa gourd.
A cylindrical-shaped common vegetable in Nepal.
Skin is peeled and mature seeds are removed prior to cooking. Goes well with potatoes.
A very mature and dried ghiraula can be used as sponge in bathrooms and kitchen. This is a very traditional practice in Nepal.
Mature ghiraula can also be recycled with plastic.
More about ghiraula –
https://agroproducts.wordpress.com/2014/10/10/the-benefits-of-sponge-gourd/
http://narc.gov.np/publicaton/pdf/book/Descriptors%20Sponge%20gourd.pdf