They’re such a great idea but then are never, never as good as I’m expecting them to be! 
I had a clear out yesterday and 4/8 of the bags I’ve used have deflated. It’s always the same. They either don’t stay airless or worse won’t work at all despite fiddling with (swearing profusely at) the valve , the seal etc etc.
Is there a wonderful place that I should be buying better ones from? Mine are from Asda/B&M type shops.
If you have landed here looking for recommendations, this thread is a bit old now, so some of these suggestions may be out of date.
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