Designed using durable silicone & heat-resistant borosilicate glass.Non-slip knob and comfortable handle for easy pressing and pouring. This portable coffee maker features stainless-steel screen filters that help strain coffee grounds or loose-leaf tea. Designed to hold 16 oz. (450 ml,2 cups) of fresh-brewed coffee, this coffee press can be used in your own kitchen, at work in the break room, or even while you’re camping or traveling on the go. Please take out the cover and prewarm the glass body with hot water before using.