Grenades survive if reaction not explosion or Beaker Pourers

[Pigbear1]

Basically, what I want is some way to pour dangerous chems from a distance, I'm thinking of things that emit dangerous gas or other dangers which belong to a secret I'm not sure if it's safe to name, But I don't want to put myself at risk pouring two beakers together, I want something made from a robotic arm + remote signaller that can have two beakers attached, and when activated pours the second beaker into the first.
I'm not sure there is a whole lot else that I can say but feel free to give feedback I guess?