Psst... We're working on the next generation of Chowhound! View >
HOME > Chowhound > Not About Food >
May 20, 2011 08:16 PM

Seltzer Water In Plastic Bottles

on average, how long till an opened bottle goes flat. my average is 3-4 hours even if the cap is screwed on tight after opening. is this abnormal??

  1. Click to Upload a photo (10 MB limit)
  1. Interesting, I've just started drinking seltzer regularly and noticed that it was flat the next day in the fridge, which surprised me.

    1. "is this abnormal??"


      Maybe the cap was leaking "air", it sometime happen when the seal is first brake open when opening the bottle; water might not leak, but air and gas will.

      It could also be depended on the "quality" of the carbonation process; or if it was natural carbonation.

      That's why I buy small bottles instead of large ones.


      1. 3-4 *hours*? I have to think you're doing something wrong (like leaving it open for a long time before putting the cap back on?) I buy seltzer in 1-liter bottles and it last 3-4 days.

        You could always try getting a SodaStream. Then you can re-charge your flat water whenever you like.

        2 Replies
        1. re: travelmad478

          or as goofy-looking as they are, those vacuum pump thingies that pump air into the bottle to help extend the life of the bubbles.

          1. 3-4 hours seems too quick, but I do buy glass bottled seltzer because it lasts longer unopened.

            1. Yes. Mine lasts at least 3-4 days (sometimes even 7 days). The carbonation gradually fades.

              Don't store opened seltzer bottles on their side - you are creating an ellipse with more surface area than a circle, so greater loss of carbonation.

              And choose a good maker - not all seltzer is equally well carbonated....