The term 'pop open, as a bottle' can be summarized by the crossword solution 'UNCORK, ' which is a six-letter word. Uncorking is the process of removing a cork from a bottle, usually to access the contents inside. This is typically done with a corkscrew, a tool designed specifically for this purpose. Uncorking is often associated with wine bottles, but it can also be used to open other types of bottles, such as champagne or beer.