Verified answer

when you pour the powder in with the water in the bottle, the spring works like a whisk , helping stirr things up !!

Protein Shake Shaker

Some protein clumps and don't actually mix, the spring thing is to whisk it.

Your college wellbeing center isn't a democracy regrettably. there is possibly a rule approximately having beverages interior the load room. i do no longer enable something yet water bottles in my wellbeing center yet whilst i know a guy is skinny and could be sipping on a carb drink, I enable it slide.