I wonder why you are not supposed to boil the keeper? Is the natural rubber going to age more quickly if you do? I even emailed the keeper customer support a long time ago, but never got an answer.

Anyway, today I boiled my keeper just to see what happens. Nothing! It actually smelled better and retained its circular shape it had lost when it was squished in the mail. I guess the lesson is: if you have to, you can boil the keeper occaissonally!

And one more question: has anybody managed to fill the keeper above the airholes? Because mine always starts leaking when it reaches that point. Sometimes just a teeny bit, sometimes a lot, but it always happens...

TIA!