Whats the deal with the bottles?
A. Some builders like the look of adding colorful bottles to the wall. Bottle-ends as they are called is nothing more than two bottles (necks inwards) wrapped in tubing, mortared into the wall. If you want to use colored bottles, make sure that one end is clear otherwise they will be too dark. It’s not a necessity, but quite a few builders use them. It also helps bring in outside light to a dark room such as a closet.