People have only just discovered the 'smart' reason bottle caps are different colours

A TikToker discovered different bottle caps mean different types of drink (Image: Getty) Most of us have never really given a second thought to why our water bottle caps come in different colours until now. Hydration is essential, and for those constantly on the go, a disposable water bottle is often the solution to quenching thirst. But have you ever scrutinised your bottle cap and wondered about its colour? The mystery has been solved on TikTok , where a viral post has sparked widespread curiosity after revealing the reason behind the varied hues topping our bottled waters, reports the Daily Star .

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.. McDonald's is giving away £200 cash to customers in new prize giveaway The bottle cap colour can identify water types.

(Image: Getty) In a vide.