The straight curtain rod will need a shower or bathtub that is design in three-wall space only, even if it can be install in regular space, it will spend a lot of space that can be useful for other things, so it is not efficient. To create a curtain rod, you can use suitable size of pipe and shape it L by using T pipe and pipe glue. This will definitely save money and also more efficient. If you afraid that it will ruin the concept of your bathroom, you can paint it or decorate it in such away that it can match with the overall concept of your bathroom. Architecture.