I use a simple, stainless steel french press, an ultralight camping tea kettle, and a standard propane stove head that fits onto to the top of the gas canister. The stove is used to heat whatever you want, from bacon to oatmeal. The press holds about ten cups.

This is an overpriced product for which there is no need. Stoves (or campfires), water/tea kettles, and the means to apply hot water to coffee grounds, have existed for decades.

The disadvantage, is that too often there's a half-second or more delay for streamed audio. Or for/with other devices or purposes.

I use an Altec Lansing iMT525 which is an awesome gadget, but while watching video clips the video is always ahead of the audio. A common problem; otherwise bluetooth is pretty handy.