Underneath the paddy's net, baskets or gunny sacks hold all the paddy seeds. The Kapalis have excelled in the cultivation of jute and manufacture of gunny bags. A gunny sack holds approximately of potatoes. Organic/natural materials such as hemp, burlap (like "gunny sacks") can be used. Gunny sacks are also popular in the traditional children's game of sack racing. Roofs of water birds' enclosures are covered with coconut leaves and wet gunny bags. Zins also started his own line of ammunition called Gunny Zins Ammo. The First World War began in 1914 greatly increasing the demand for gunny bags. A Gunnery Sergeant ("Gunny") who Mac recruited for JAG. The word "gunny", meaning coarse fabric, derives from an Indo-Aryan language. Master Gunnery Sergeants are sometimes referred to by the nicknames "Master Guns" or "Master Gunny". Gunnery sergeants are commonly addressed as "Gunny", but never officially. Gunnery sergeants are commonly referred to by the informal abbreviation "gunny". His friend Manny saved him and Gunny later reenlisted. Unlike "Gunny" and even "Top", a First Sergeant is never addressed as "First Shirt" directly.