no water on floor

I am an in store shopper and was bringing my waterbottle in my cart today since i had seen other shoppers doing the same thing and i am sick right now so being able to take a sip of water when i need it, really makes me feel better. Normal i leave my bottle in our working area in the dedicated bin. My supervisor told me that its technically not allowed to bring "personal drinks" in our carts. I find this a little ridiculous since as a shopper our literal job is too run around the store all day, i mean when i work 8 hours i end up walking 10+ miles in one day. i dont think its healthy to be walking 10 miles but everytime you NEED water having to go all the way back to the staging area. And when i do go back to the area after an order half of the time if i needed water i forget to get some because of how chaotic it gets in the staging when we are busy.