... .Borosilicate glass,hand by hand,good for health 3.logo is ok 4.OEM is ok 1.Blooming tea glass teapot tea set,hand made,mouth ... blown,1000ml,also can made by client's requirements.2.Now ... this glass to avoid fracturing the inner layer...also use care with metal spoons or placing the glass into a crowded dishwasher. hand made glass tea ...