u/Impossible-Koala-195

Heyy everyone. I’m not sure if I’ve posted before but I am a long time use of this sub. I keep seeing people using drink testing strips, that change colour based on whether the drink is full sugar or not. I mainly see it on Instagram. Unfortunately (or fortunately?) I am very skeptical of basically everything I see online. Are these real? Do they actually work? Or is this just some gimmick? Not all the videos I see are marked as Ads but I know shady business practices are a thing and people don’t always disclose. I have searched this sub already in case the question was asked and didn’t really see them being talked about much in terms of their effectiveness. Is this a scam?