Egg bottle science investigation

We really enjoyed this experiment, once we got it to work! We decided the problem was that we didn't have a glass bottle with a wide enough neck for the size eggs we were using. Everyone got excited as the egg got sucked into the bottle - but then it stopped, twice. The third egg was slightly smaller and we watched it get sucked right into the bottle. We cheered when it disappeared inside.
The egg did break up a bit as it got pulled in.