Caveat: my Kindelein declared nipple confusion myth and assumes all Flschen and chest in exchange, while milk comes out. Therefore, I soon by all common bottles and the like well Lasinoh me: 1. it is small and compact 2. Due to the slightly oval shape it fits comfortably in your hand 3. the vacuum cleaner is gegormt nipples similar 4. Baby must vigorously so suck milk comes 5. after repeated decoction of the plastic is still clear 6. It does not need an extra cover to reasonably leakproof to be the sucker keeps well sealed and with the protective cap the few leaked drops are absorbed well. The only complaint: the local drugstore I get neither accessories nor spare.