Description: Aluminum foil inner design brings excellent cold and heat insulation effects. Side pocket design allows you to store a phone or other cycling tools. Three fastener tape designs help fix the bottle to prevent rocking. Drawstring design helps tighten the bag mouth to prevent falling when cycling. Made of high quality polyester material, it is waterproof, anti scratch and wear resistant. Pearl wool inter layer design makes it shockproof and impact resistant. The height of the before expand size is 18cm, the diameter is 9cm. The height of the after expand size is 21cm, the diameter is 9cm. The applicable bottle diameter is 9cm. It is suitable for outdoor cycling. Bottom drain hole design helps drain the water on rainy days. Movable strap design makes you can adjust the position as needed. Large capacity and heighten top design allows it to accommodate large water bottle. Item Name: Bike Bottle Bag Material: Polyester Capacity: 1.2L Features: Heat Preservation, Drawstring, Cold Insulation Size Details: Before Expand Size: 18cm x 9cm/7.09" x 3.54" (Approx.) After Expand Size: 21cm x 9cm/8.27" x 3.54" (Approx.) Applicable Bottle Diameter: 9cm/3.54" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Bottle Bag (Others Not Included) Aluminum foil inner design brings excellent cold and heat insulation effects. Side pocket design allows you to store a phone or other cycling tools. Three fastener tape designs help fix the bottle to prevent rocking. Drawstring design helps tighten the bag mouth to prevent falling when cycling. Made of high quality polyester material, it is waterproof, anti scratch and wear resistant. Pearl wool inter layer design makes it shockproof and impact resistant.