Specifications: The top of the bottle mouth is round and smooth, which is convenient for pouring liquid. Clear scale of the bottle body makes it easy to observe the volume. Made of high quality lead-free glass, it is durable, anti-rust and high temperature resistant. Type: Conical Flask Material: Lead-free Glass Product Specifications: 50ML, 100ML, 250ML, 500ML, 1000ML, 2000ML Features: Easy to Use, Durable, High Temperature Resistant Bottle Mouth Diameter: 22mm, 24mm, 30mm, 36mm, 40mm, 53mm(Approx.) Bottom Diameter: 52mm, 65mm, 81mm, 108mm, 129mm, 163mm(Approx.) Height: 91mm, 111mm, 149mm, 183mm, 228mm, 295mm(Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Conical Flask