The Ladybug Milk Collector is simply that – a milk collector. It collects your let-down as you get on with your day – unlike our silicone pumps, which generate continuous suction that draws out your milk. The Haakaa pump is designed to help you express milk, while the Ladybug is simply a tool to collect the milk that you naturally happen to produce during the day. The suction the Ladybug produces is not strong enough to help you express milk on its own.