1 L flip top problem

[Sean]

I bought some 1 L flip cap bottles and they do not seem to hold pressure.

Smaller bottles from the same batch are fine, the 1L are flat. This one I stored on its side, I don't know why I thought it might seal better on the side, but all the rest are stored upright.

This has happened several times. The first batch I got 3 or 4 bottles that were fine, the other 8 or 9 were flat. I keep trying different things, and filling only one bottle from a batch to see if it works. Not much luck.

I tried putting the seal in the water with the caps - no help. At first I thought maybe they just need breaking in, but now I am just frustrated.

Any thoughts?

 

[usnsti]

Maybe you could put something in the cap, where the lever passes through. To take out some of the gap, and get more tension on the cap.

 

[Sean]

That's a good thought..