Several years have passed since the purchase, and as it is a natural material, there may be some sediment. As time has passed, please use it on your body at your own risk. The manufacturing date, etc., may have faded. The top of the cap has some dullness due to metal deterioration. ◆I am currently listing Equilibrium bottles one after another as I am not using them. Please feel free to inquire if you would like any other numbers.