[markem]

Heartfelt beads, if kept in a sealed container such as they ship in, will not "expire". Over time in a humidor, it is possible for the HF beads to "clog" (for some definition). This is a problem that the beads that cigarnut sells doesn't have.

I used HF beads for years and years without issue and even did like you are considering and pre-bought several pounds in anticipation of the slope without seeing any noticeable effect.