I bought the smallest bags hoping to use them when travelling. Shrinking a towel, blankets, etc to put in a duffle/luggage would of been nice to reduce cargo size. However even these are about 40% too big. Due to this, I have not found a use for them yet. The hand pump takes far too long to suck the air out for repetitive use. So it seems I have to find some "guest" or storage blanks to use them on. Set it then pack it away.