Pour some liquid smoke on the pork but then add a generous amount of dry rub on all sides of pork butt, wrap in foil/plastic baggie and refrigerate overnight.

In a bowl combine 1 half bottle of BBQ sauce, the coca cola and the apple cider vinegar.

Cut pork but into 3 pieces to fit in bottom of instant pot.

Select sautee/brown function on instant pot. When done warming up add the pork butt and brown on both sides for 2 minutes each. (When done select stop on instant pot.)

Add BBQ mixture in bowl to the instant pot over pork butt.

Select the no steam/pressure cook nozzle. On instant pot lid.

Seal the top in the locked position and select the meat function, make sure on high setting and adjust timer to 40 minutes.