I'm talking about those plastic bags that you can store duvets, pillows, clothing etc and you suck all the air out with a vaccum cleaner and everything is flat as a pancake. I've tried a couple of brands in the past but I find that the seals are really fiddly. Why can't they just have a sturdy zipper?The ones I've had in the past one has to try and snap together ridges of plastic and pull along a special tag to seal it and then find it's come un popped before you've even got to the part where you remove all the air..and when you do they don't stay flat for long 'cause invariably the seal fails. Does anyone know of any more fail safe bags, 'cause they're a great idea, but I don't want to waste any more money on what essentially are giant sandwich bags - Like I say one with a zip that actually works would be great! I've seen some that you have to manually roll and press to get the air out, but that sounds like too much hard work for me. So yes, if anyone has come across a reliable set that uses a vac please let me know! TIA