Important: This is not what a Blindness Potion would have. If you want a Blindness Potion then you’re in the wrong post.
The Lingering Water Bottle doesn’t do anything. You would think that it would put out more fires than a regular Splash Water Bottle but it doesn’t. Since this doesn’t happen I would like to consider this idea that I got from Minecraft Story Mode Season 2. If you all played that game then you know what’s coming. If a player throws a Lingering Water Bottle, it will create a giant cloud of steam limiting the targets sight of vision. The cloud would go many blocks high and a reasonable distance of width. It won’t be a Blindness Potion but it will still be pretty effective. This is a must need addition for Minecraft and I know that a lot of people will agree with me.