Having just spent much time packing and evacuating air from many, many Vacuum Bags I can offer this handy advisory; spend the extra money on buying the "Original Space Bag" with the capless valve. Once you've sealed it properly you are done, some of the other brands will hold a vacuum when sealed only for as long as you keep the vacuum hose attached.
FrankenLab:
Turning tone wood into expensive sawdust since 2016!
Fender electric Fat Strat mim. (Bought)
Maton Electric Acoustic EM325C
Pitbull Guitars ST-1 ( finished) http://www.buildyourownguitar.com.au...ead.php?t=5970
Pitbull Guitars SG-2 ( Finished) http://www.buildyourownguitar.com.au...ead.php?t=6124
Pitbull Guitars JM-1 (Finished. 2018 June GOTM))http://www.buildyourownguitar.com.au...ead.php?t=7150
Pitbull Guitars TL-1 (In production) [url]https://www.buildyourownguitar.com.au/forum/showthread.php?t=8676
Fender electric Fat Strat mim. (Bought)
Maton Electric Acoustic EM325C
Pitbull Guitars ST-1 ( finished) http://www.buildyourownguitar.com.au...ead.php?t=5970
Pitbull Guitars SG-2 ( Finished) http://www.buildyourownguitar.com.au...ead.php?t=6124
Pitbull Guitars JM-1 (Finished. 2018 June GOTM))http://www.buildyourownguitar.com.au...ead.php?t=7150
Pitbull Guitars TL-1 (In production) [url]https://www.buildyourownguitar.com.au/forum/showthread.php?t=8676