Constructed of heat-resistant borosilicate glass. Thick, beaded top is slightly flared with a sturdy fused handle for durability. An enameled area let's you make pencil markings. Capacity is measured to the rim. Pkg. of 6. Choose from 250mL (No. 88246), 400mL (No. 88247), 600mL (No. 88248), 1000mL (No. 6737) and 2000mL (No. 8796) capacity.