The Nest Pour Over Dripper incorporates double-walled insulation with 304 food grade stainless steel materials. It is compatible with the VSSL's reusable #1 304 stainless steel mesh filter. The integrated dual threading allows the coffee pour over dripper to assemble with the Nest System into one compact, transportable unit, or serve as a stand-alone coffee dripper that can simply sit on the top of most mugs. Tech Specs Dimensions: 3.2” Tall / 3.4” Diameter Weight: 4.6 oz (131g) - Nest Dripper - 304 Food Grade Stainless Steel 80% Recycled Care For optimal care, this product is recommended for hand washing only.