Can be used with either a wide or narrow mouth. With a large capacity of 1000ml, you can reduce the number of refills. It has been cleaned thoroughly. The scent of the shampoo and conditioner that were previously in it may still linger slightly. Please refrain from purchasing if you are concerned about minor details. The following is quoted from the manufacturer: Refillable container with a pump, ideal for high-viscosity treatments and conditioners. ● Capacity: 1000ml ● Product Description ◇ Pump bottle ideal for refilling high-viscosity liquids. Container Shape: Circular Container Material: PP (White) Container Size: Total height 235mm, body diameter 110mm Pump Dispense Volume: 3cc per pump ● Manufacturer: Made in Japan ● Usage Instructions ・The disc-shaped part inside the container is meant to be placed on top of the liquid. However, please remove the disc-shaped part initially and try using the bottle without it (if the liquid dispenses without it, it is not needed).