I can’t answer regarding the electric ones but I’ve tried the manual pump. Easy to use but subsequently after using it for 3-4 times the suction is badddddd. 🙄 Also, not forgetting that if you’re using manual pump, it’s double the time as compared to dual electric pumps. Hegen bottles & parts can all be used in UV sterilizers. Just keep the teat further away from the UV (put it at the bottom layer.)