Safe Glass Material -- The cute tea infuser is made of food grade high borosilicate glass material, non-toxic, lead-free. The cork stopper is made of oak. Heat-resistant, cold-resistant, explosion-proof, healthy. Universal Use -- Our glass tea infuser is used to brew loose tea with simple tube design, easy to clean, reusable, very small and lightweight, easy to carry when traveling outdoors. Can be used for other herbal teas, flower tea Special Tube Shape -- Tea infuser for loose tea with simple attractive test tube design, non-toxic, rust-proof, evenly carved and leak-proof, good filterability, easy to open and close, convenient glass tube tea infuser Easy to Clean -- Remove the cork, put in the right tea you like, pour water into the cup and finally the tube infuser, the loose tea will sink to the bottom of the tube defuser and will not leak out. Put it down and out, strain the tea clean, you can control the tea soup according to your needs