Guys, thank you much for the warm welcome and feedback. I'll look into the ryot, thanks! If I was to suggest a design mod to this thing, it would be a small silicone cap or plug tethered to the unit, which would fit either over or in the mouth piece itself. Would be a more elegant solution than the cap HR is coming out with, methinks. It shouldn't be that much more cost from a mfg standpoint, and I'm thinking most people would be willing to shell out another $5 for such a feature.