How do I know? Well, I tested some myself, polled Cosmo editors for their expert recs, and combed through reviews to find the best water bottle sling bags and bring them straight to you.

I got the Béis Sport Sling in Olive—the brand's newest ... Unlike the Béis bag, the Calpak Water Bottle Holder doesn't have multiple zippered compartments or space in general.

As you can imagine, this can sometimes limit my everyday bag options. So, when I saw that TikTok was buzzing over the Béis Sport Sling and the Calpak Water Bottle Holder, I knew there was only ...

The solution? A water bottle sling. Most sling and belt bags are small by definition, which means you're lucky if you can fit your wallet, phone, and sunglasses inside, let alone a whole hydration ...