Little quiz: What is this green liquid?

A little quiz. This one has no prize I’m afraid, but I’ve got two prize-laden quizzes in the pipeline for later this week and next week, so this will be a good warm up. Question: What is this green liquid, and what is it doing in this bottle? Answers in the comments – I’ll post…

A little quiz. This one has no prize I’m afraid, but I’ve got two prize-laden quizzes in the pipeline for later this week and next week, so this will be a good warm up.

Liquid

Question: What is this green liquid, and what is it doing in this bottle? Answers in the comments – I’ll post the correct answer tomorrow.