I am a convert to Stash tea. I am sure you can get it in stores in the US, I think it is a northwest product. It is worth buying. That big ole gift box of theirs is one I received from some very dear friends of mine when my Dad passed away and I LOVED all the flavours I tried.
I highly recommend the China White, the Exotica Reserve Blend and the Silver Jasmine for those folks who like to experiment.
The Christmas White tea that I just bought is really lovely. The smell is quite minty, but is mellowed a bit by the white tea. I think it would work wonders for an upset tummy being that is has both peppermint AND ginger.