Twitter announced a few days ago that it will test a new, disappearing messaging feature in Brazil that has more than a passing resemblance to the format pioneered by Snapchat and later copied by Instagram. Dubbed “fleets,” as in fleeting, the text-based messages live outside of users’ main feeds and will disappear after 24 hours. Just like with Instagram Stories, to see fleets you’ll need to click on a fleeting user’s profile pic, which you’ll find at the top of your timeline.