A couple of years ago I bought a chlorinated latex sack with a neck entry. I thought that a tube or a valve is a

eady attached to it, but no 😟 One bad thing about the neck-entry is that it's too tight against the neck. OTOH, it's air-tight.
(16 Dec 2016, 15:23 )ltxrob Wrote: Then suck with your mouth and out through the nose
Yes, I had a similar idea, but using a valve glued to the sack. I think that this solution:
(16 Dec 2016, 15:23 )ltxrob Wrote: I read (maybe on here) that a lubricated tube can be inserted down the neck of the bag
might not work, because you have to use either a thin tube to keep it more air-tight (but it's VERY difficult to suck the internal air out with your lungs through a narrow tube, I tried), or a big diameter tube to suck quickly, but it will not be hermetical. So, I would prefer a glued valve. Doe anybody know where to get one?