Tea & coffee maker All in one design helps you make the tea and coffee freely. Seals inner cup makes tea and coffee tasty. Super steel filter with 80 mu. Fit to several person uses. Choose thick or light tea with easy method Fit to home, office, hotel, bar and travel uses. Preciseness selection Our plastic components select the highest quality material, safety as food, fit to fda standard. The filter made from 316# steel, which is acid resistance and alkali proof. Outer cup made from hard borolisicate glass could use in burning and microwave. Manufacture warranty Inner cup is the technical key of the super cup. We are the only one solve the question how to seal the cup. Our inner cup could seal the water more than one minute.