Drunken Resilience (Ex)
At 13th level, a drunken master gains DR 1/— as long as he has at least 1 point of drunken ki. At 16th level, the DR increases to 2/—. At 19th level, it increases to 3/—.
Adamantine Monk (Ex)
At 9th level, a monk of the sacred mountain has muscles so strong and skin so resilient that he gains DR 1/—. This DR increases by 1 for every three levels thereafter. As a swift action, the monk can spend 1 ki point to double his DR until the beginning of his next turn.
Do they stack and if so do the DR double from both then you use 1 ki point?
No, DR never stacks with the exception of some abilities that say it explicitly stacks.