This running waist pack can hold two plastic bottles. For reference, the photos show it with a 600ml Aquarius plastic bottle (empty) inside. *Plastic bottles are not included. It uses a wide waist belt that securely holds the pack around the pelvis, reducing bouncing and slippage. A stretch mesh pocket is placed in the center, making it easy to store a compact jacket or small items. Reflective lines are included for visibility at night. The waist adjuster belt uses a one-touch, detachable buckle. - Brand: ASICS - Color: Black - Style: Running waist pouch - Size: Free size Please refrain from purchasing if you are overly concerned about details. Please judge the condition based on the photos. Thank you for viewing.