Coffee maker is made with Borosilicate glass . Stainless steal. Stainless Steel frame holds 400 ml of coffee. The dimensions are 6.25in x 6.25in x 13.5in. Tolerance of instantaneous temperature difference from -30??C to +150??C without any cracking. Tolerance of temperature as high as 600??C without any cracking. Perfect Cold brew coffee maker for Home . office . bar . restaurant . ect. Container can hold anything from water . tea . coffee . juice . etc. Hand made . the glass is heavy duty . and hand blown. Cold brew makes less acidic coffee . with a sweeter . and richer taste.