Even though Snapchat has quickly become a huge communication platform, there are still basic features it lacks, like group messaging. With Snapchat Groups, announced today, the app is beginning to fill those gaps. It'll let you start group chats with up to 16 of your Snapchat friends. And, as you'd expect, the conversations will disappear after 24 hour. Recipients will also only be able to view Snaps sent to the group once.