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<blockquote data-quote="guywhofishes" data-source="post: 359959" data-attributes="member: 337">Smooth - the texture is there to let fluids (hopefully only air) from inside the bag creep out toward the vacuum that is occurring only at the opening. The atmosphere reacts by pushing all fluids (including water, broth, etc.) toward the opening. Without the crinkles it doesn't work - there's no sneaky open pathways for fluids to escape.In a chamber vacuum the vacuum isn't focused only on the bag's opening - it occurs at all points inside and outside the bag. So zero uneven pull/push of fluids - it's dead calm in a sense.You can vacuum pack water. It literally BOILS as you watch the dissolved gases leave the water. Once sealed, and the pressure of the atmosphere is allowed back into the chamber - BOOM - the boiling stops. Not a drop leaves the bag and the bag is cool to the touch. It really freaks most people out that water boils at room temp.The bags are about a nickel a piece in bulk. You can also get ziplock style, boil in bag style, food prepper foil backed bags, etc.</blockquote>

[QUOTE="guywhofishes, post: 359959, member: 337"] Smooth - the texture is there to let fluids (hopefully only air) from inside the bag creep out toward the vacuum that is occurring only at the opening. The atmosphere reacts by pushing all fluids (including water, broth, etc.) toward the opening. Without the crinkles it doesn't work - there's no sneaky open pathways for fluids to escape. In a chamber vacuum the vacuum isn't focused only on the bag's opening - it occurs at all points inside and outside the bag. So zero uneven pull/push of fluids - it's dead calm in a sense. You can vacuum pack water. It literally BOILS as you watch the dissolved gases leave the water. Once sealed, and the pressure of the atmosphere is allowed back into the chamber - BOOM - the boiling stops. Not a drop leaves the bag and the bag is cool to the touch. It really freaks most people out that water boils at room temp. The bags are about a nickel a piece in bulk. You can also get ziplock style, boil in bag style, food prepper foil backed bags, etc. [/QUOTE]

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