It makes a sound when shaken. I think it's the sound of the dent-prevention support posts moving. It shows signs of use, but there are no problems with its use. Please check the images. ONOE Metal Hot Water Bottle (Iron/Galvanized Steel) 2.4 Liters, with or without cover, for bedding, camping, and outdoor use. [Size] Length 30cm, Width 22cm, Height 7cm Color: Silver [Product Description] Soft heating that maintains moderate humidity. You only need to pour in boiling water, so there's no risk of carbon monoxide poisoning. Country of Origin: Japan Size: 2.4L Thank you very much for reading to the end. We hope you will purchase after confirming the above. If you have any questions, please feel free to contact us via message.