Don't tell them. Experiment first

But you don't need to feel guilty. Why would you? You already tried telling your friends, and they didn't believe you.

This isn't like attending the Superbowl with Sully, or winning a Super Smash Bros tournament in 5th grade. You're like that bullied kid in the OG Jumanji movie. No magical adventure artefact like this will ever come your way again. If this is a delusion, if it's a dream, you don't want the bubble to burst just yet.

You can't even be sure if what happened was a fluke, or if every drink that comes out of the Juicer turns people pink. For all you (or they) know, you are crazy. No, what you really need to do is test the Juicer. When you're sure you haven't gone crazy, then you can figure out how to tell your friends about the discovery.

With your friends still disagreeing about the inherent sexism of naming a soda brand Bimbo Juice, you stand squarely in front of the machine and take the controls once more.

You want to understand the machine. Curiosity draws you to the flavor panel, and that's when you begin to understand.