I'm constantly amazed at Vietnamese ingenuity. The saying, "If there is a will, there is a way" applies here more than any place I've ever been.
When we went to Huyen's grandfather's village, someone brought a bottle of Da Lat wine. The problem with Da Lat wine is that it is sealed with a cork. All of the wine that is usually drunk in Huyen's Grandfather's village is from twist off bottles so hence nobody had a wine opener. The lack of a tool though didn't dissuade the crew of wine-thirsty men who quickly proceeded to figure out another way to open the bottle. The quickest and most logical way they came up with was to use a screw: