Over the past few months, KSI and Logan Paul's new drink range, Prime, has taken the world by storm.
People have literally been scrapping with one another in shops to get their hands on a bottle of the Hydration drink.
Some supermarkets have even had to put limits on the number customers can buy they're that popular.
But that's nothing compared to the furore around their new range of Prime Energy cans, which fans of the YouTubers have been forking over hundreds to get their hands on.
For those - very few - of you who don't have a clue what I'm on about, let's have a recap.
Prime Hydration is a low calorie sports drink, which contains coconut water, and has no sugar or caffeine.
Prime Energy, on the other hand, is its turbo-charged, roided up cousin.
The 355ml drink contains 200mg of caffeine, way more than a 500ml can of Monster Energy, which has 160mg, or a Red Bull, which has 32mg per 100ml of the stuff.
But while the law in Australia states that drinks can't contain more than 32mg of the stuff per 100ml, there appears to be a little loophole that will allow KSI and Paul to flog as much of their drink down under as they like without having to change it.
Speaking to the Sydney Morning Herald, Dr Gina Trapp, the head of food and nutrition research at the Telethon Kids Institute, said it's all about marketing.
She told the outlet: "If a product is called a ‘dietary supplement’ it is not bound by these caffeine limits."
This comes after a doctor warned people about letting their children get their hands on the new cans of Energy.
Dr Deborah Lee, from Dr Fox Online Pharmacy, previously said Prime Energy could be damaging to a child's health.
"I would not recommend children drink Prime energy drinks or other energy drinks for children of any age," she told the outlet.
"Children don't need energy drinks anyway - they have plenty of energy! If your child is lacking in energy take them to see their GP, do not give them an energy drink.
"It encourages them to want sweet drinks, when plain water is the answer and helps them develop a sweet tooth which is not good for the future in terms of a healthy diet and controlling their weight."
Prime's website also states that it is not for the consumption of kids.
It states: "Prime Energy contains 200mg of caffeine, per 12 oz. can. PRIME Energy is not recommended for children under the age of 18, women who are pregnant or nursing or individuals who are sensitive to caffeine."
LADbible has contacted Prime for a comment.Featured Image Credit: @ayersindy/twitter/instagram/DrinkPrime