GSTC provides silicone vacuum cups with a convenient release valve to assist in breaking the suction seal upon removal. It has a soft and adaptable design made from flexible silicone material and is available in 50 mm and 60 mm sizes to suit clinical requirements. This product is used by trained healthcare professionals in appropriately selected assisted delivery procedure.
For more details - https://www.gstc.com/product/silicone-vacuum-cup/