How do I get the dva twitch sprays?

[Bombz-1611]

Just watch the eligible streams. They lay it out in detail on the official posts:

Suit Up for D.Va’s Nano Cola Challenge!

D.Va Nano Cola Challenge FAQ

To complement the release of our limited-time D.Va’s Nano Cola Challenge, we’ve teamed up with a suite of broadcasters and Twitch to release a series of themed Twitch Drops! Between now and September 10, unlock eight all-new D.Va’s Nano Cola Challenge sprays simply by watching select streams on Twitch. For more details, please check out the blog post here. IMPORTANT: In order to earn D.Va’s Nano Cola Challenge Twitch Drops, you need to link your Blizzard and Twitch accounts. Visit the Twitch C…

Just make sure the ones you’re watching are on the list of streamers shown in the links above. Some other streamers (notably xQc) will pretend they’re included in order to lure viewers to their streams.