Features: Featuring a hangable design and crafted from lightweight component, this water bottle cover ensures effortless carrying and saves valuable space during commutes Combines aluminum foil layer with pearl cotton improvement, in a triple layer structure, to maintain food freshness and reduce heat loss efficiently over time Supports most cup sizes to fulfill daily requirements, maintaining excellent insulation and cooling while ensuring water bottle cover adapts perfectly to large capacity container preferences Equipped with a refined, smooth metal zipper, ensuring secure closure, alongside excellent temperature locking, and enduring insulation in a washable format Enough for beach trips, gym workouts, road trips, or kitchen use, it functions as both a protective cooling bag organization and a compact storage solution for hot/cold containers. Specifications: Component:Aluminum Foil Size:Approx.25x8.5cm/9.84x3.34inch Package Includes: 2 Optional Package: Package 1 Include:1Pc Bottle Sleeve Bag Package 2 Include:2Pcs Bottle Sleeve Bag Package 2 Include:3Pcs Bottle Sleeve Bag note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.