AcuZone square cups are designed to be stackable to make storing easier and more organized. They are heat resistant to allow you to boil to disinfect and offer replaceable valves for easy cleaning and longevity.

Each suction cup may need the seal on the nipple to be loosened before use for proper suction. If cup does not work (no suction), lift and twist airlock nipple (part that attaches to pump) several times. This should loosen the seal and enable the cup to create proper suction.

Please note that each silicone tip has three slits. When using the cups for the first time, you must press down on the blue silicone tip prior to using in order to open the air gap. The air enters and exits through the slits (air gap) on the silicone tip, so you must press down on the silicone tip prior to first usage to ensure proper suction. Additionally, when the weather is hot or the cups have not been used for a while, the slits on the silicone tip may stick together, so it is very important that you press down on the silicone tip before using.