Yama Glass 18 oz Coffee/Tea Sock Pot (Sock Included) Light weight but strongly constructed pour over coffee maker perfect for use just about anywhere Made for Premium Hand Blown Borosilicate Glass Borosilicate glass is non-porous and does not absorb chemicals meaning each brew is pure every single time Includes reusable filter sock that can be used with most other pour over units. Perfect for brewing tea as well! Open spout design allows for quick seamless pours