What Our Gearhead(R) Experts Are Saying:"I like bottles that don't fight back when I'm trying to hydrate mid-effort, and the Cloud Water Bottle is perfect for that. It's super light, squeezes easily, and the wide-mouth opening makes it quick to clean and refill. It's basically the pro's bottle-simple, fast, and efficient."When we're racking up summer miles and need quick hydration on the fly, the Castelli Cloud Water Bottle delivers with effortless performance. Designed by Elite and modeled after the Fly Team bottle, it features ultra-thin walls for easy squeezability and a fast-flow soft rubber nozzle that helps us stay focused on the ride-not the bottle. At just 53 grams, it's one of the lightest bottles in our kit, and the wide-mouth design makes mid-ride refills and post-ride cleaning easy and efficient. With 550ml of capacity, it's the perfect companion for short efforts, intervals, or stuffing a few extras into that second cage for big mileage days.