I've got one of those vacuum caps for wine bottles which might work better.Teef posted a picture of these Beer Savers caps a while back and I though they'd be a bit of fun for Mrs 3BM's beer as it oft takes her 2 nights to finish a bottle. Bought these off the 'bay and I think they might be cheap knock-off. The first one lasted an hour or so before the pressure popped it off towards the heavens, fecked if I can find it! So I've adopted this fail-safe method to ensure there's no more of this nonsense. Think I'll go back to slamming the caps back on...
View attachment 98969
I use it if I can't quite finish the second bottle...
http://www.nisbets.co.uk/Vacu-Vin-W...fRdgBUSNch-ubqcrP4H4XeR_TfFFD4vJzkxoCr8Hw_wcB