This is a set of 5 lidded yunomi (teacups) that were stored at home. I am not familiar with pottery or tableware brands, so I am unsure of the maker, but they are very beautiful, and since we rarely use them, I would be happy to pass them on. Regarding the reason for "some staining": There are 5 in the set, but two of them have chips on the rim (see photo 4). Also, although they have been disinfected and washed, some discoloration remains on the underside of the lids and the bottom of the cups. Please understand that these are used items. Thank you very much. (Price negotiations are possible) #Yunomi #Lidded Yunomi #Indigo Blue #Set of 5