tear gas canister, 催淚瓦斯罐

A Palestinian demonstrator throws back a tear gas canister that was fired by Israeli troops during a demonstration, calling for the release of Palestinian journalist Mohammed al-Qeq, outside the Ofer military prison near the West Bank city of Ramallah.
February 11, 2016
http://www.voanews.com/media/photogallery/february-11-2016-day-in-photos/3186911.html