Iris café Nimman is interesting because you will find some coffees and teas almost nobody else does in Chiang Mai:
1. Vietnamese egg coffee
2. Hot Latte in a coconut
3. Orange coffee with actual good orange juice in it...
And more.
.
They also have Chinese tea in the same place, including full bodied teas you seldom find elsewhere (and coffee lovers sometimes like):
1. Authentic Lapsang Souchong (smoky tea).
2. Puer tea (tea aged 20 years).
3. Actual good black teas.