This is great for collecting milk off the alternate breast whilst baby is feeding on the other one. I produce a lot of milk so I just attach this, saves wet tops and an half soaked baby after the neglected breast decides to pull a water gun shoot and sprays everywhere.
The suction cup holds well but I do find myself emptying before hes finished and reattaching because it can feel heavy on the boob with a lot of milk in.
Would recommend this product.