The Koios 4-in-1 vacuum food sealer isn’t the loudest machine we reviewed, but it still requires you to raise your voice a little if you need to talk while using it. It seals quickly and pulls a lot of air out of the bag during the process, but we did discover a couple issues while testing this machine.
When we sealed the chicken breasts, the air was sucked out so well that the bag rippled a little and folded over on itself. This caused the bag to not lay flat. This was the only food vacuum sealer that created a bag that didn’t lay flat. We experienced the same issues when sealing bread slices. But in both instances, and during other tests of dry foods, the bag was sealed tightly.
However, the Koios had a different effect on the hamburger patties we sealed. Though it appeared the bag was pulled tightly against the meat, within an hour of sealing, the hamburger patties turned brown. This is a sign that air was still left in the bag.
This food vacuum sealer didn’t do well sealing juicy foods either. While it pulled 1/8 ounces of juice from the pineapple rings we sealed, a good testament of the power of Koios’ vacuum, the bag didn’t seal properly. There were several gaps where the bag didn’t seal at all and several other points where the seal wasn’t very strong. Most food vacuum sealers we tested had issues sealing juicier foods. The Hamilton Beach is one of the exceptions; it sealed juicy foods quickly and securely.
Despite the issue with the bags, Koios isn’t a bad choice for preserving foods, especially dry foods. It comes with 10 pre-made sealer bags and a vacuum pipe for canning. The Koios 4-in-1 vacuum sealer also includes an industry standard, one-year warranty.
The Koios 4-in-1 food vacuum sealer does a decent job sealing certain types of foods, most especially dry foods. Some meats are sealed well, too, though we noticed hamburger turned brown quickly after sealing when other sealers didn’t have this effect on the meat. Also, the bags don’t lay flat after sealing, so they won’t be as easy to store. This machine comes with a vacuum hose for sealing cans and 10 pre-made bags.