You start with distinct colors, and end up with a purple liquid.

A thin stream of purple liquid fell from it into the cauldron.

A pool of green and purple liquid had congealed near the mouth.

A few drops of purple liquid were scattered around as well.

When one appears with a purple liquid in it, he takes the tube and runs.

Passing on to Poirot, he put down a glass filled with a dark purple liquid.

He held the bottle of purple liquid up, offering to share that as well as the window.

Men sat inside the room the door opened upon; they were drinking some pale purple liquid that could have been grape juice.

Some of them contained purple liquid and solid, jelly-like things.

In the series, young Dani becomes invisible after drinking a purple liquid.