Pour 1 cup of this over the pork. Set aside the remaining sauce for later.
Secure the lid on your Instant Pot and select manual and cook at high pressure for 50 minutes. Let your Instant Pot do a natural release for about 15-20 minutes.
Shred pork and remove about 3/4 cup of the liquid from the Instant Pot and discard. Pour in the reserved liquid you made earlier and stir.
I have used a pork sirloin roast and a boneless pork picnic roast, either one works fine.
After the pork has cooked, I like to remove some of the liquid from the Instant Pot because it become slightly "watered down" from all the steam. After I drain about 3/4 cup our, I then add the reserved liquid to the pork.
I've never posted my slow cooker version of this which is kind of criminal, but anyway, if you don't have an instant pot then you can use a slow cooker by placing the whole pork in your slow cooker with about 1 cup of coke and 1/4 cup of water. Cook for 7-8 hours on low or 4-5 on high (or until pork shreds easily). Remove pork and shred, drain juice from slow cooker and return shredded pork to slow cooker. Pour the sauce you made in the blender over pork and cook on low for about another 45-60 minutes.