Filter Cups:500ml (glass) Product Features: 1, Zinten filter cups are made of high quality glass material, the glass is smooth and transparent, no air bubbles, and the wall thickness is uniform. 2、Using special hard high-quality glass material, good pressure resistance, can be 121 ℃ hot pressure sterilization sterilization. 3、Zinteng solvent filter cups are available in 300ml and 500ml sizes, which are suitable for Zinteng one-liter and two-liter filtration devices respectively.