Regarding the "fat glencairn", is this it: https://www.amazon.com/dp/B07BHKXNVY/ref=cm_sw_r_apa_i_DhdTEbJM7CNGQ. I think that's the "official glass of the bourbon trail". I actually have one and they are pretty nice, a little better for certain high proof whiskeys than glencairn if you are sensitive to the ethanol. But ultimately, it is a nice hybrid between a rocks and glencairn.

That Denver and Liely glass is gorgeous but definitely pricey. Outside of the ergonomics, do you notice any improvement in flavor?

They can be picked up from Amazon or Bed Bath & Beyond.