Plastic bottles are widely used in daily life after their discharge. Of them make flower vases, pots, tents, covers for shelter of plants and even use as a building material. Here’s another option for their application. If you pick up a couple bottles of cylindrical parts which differ slightly in diameter (average 0.5—1.5 mm), and cut off their necks so that you can insert the glass in the other, you get a very good case for breakable objects. If necessary, glue the inner walls of the bottles with a foam rubber or other soft cushioning material.