High-Quality Material: Crafted from premium borosilicate glass, this pour over coffee dripper offers exceptional heat retention and durability, effectively preventing heat loss while fitting most mugs and thermoses. Inner Wall Concave Rib: Featuring a unique concave groove design on the inner wall, this dripper ensures a snug fit with filter paper, allowing for optimal extraction of coffee essence. Smoother Permeability: The innovative concave surface design of the TIMEMORE pour over coffee dripper promotes faster water flow, minimizing contact time with the coffee grounds and preventing over-extraction. V-Shaped Design: The V-shaped conical design allows coffee grounds to pile higher, extending the contact time with water for a richer, fully infused coffee experience. Fits Most Cups and Carafes: Equipped with a detachable base stand, this coffee dripper features a non-slip flat base, making it versatile enough to brew coffee into various containers, including narrow-opening thermoses and standard coffee mugs.