This shape is called a Klein bottle if anyone was curious. There are some neat math videos about topology that discuss it. Water poured into the top can get into the interior through the handle.

If you live in a climate that needs air conditioning to be comfortable most of the year, your roof and walls should be as white as possible. I have seen black shingles on new construction in Texas…

Also, toilet paper direction is a personal preference and is often driven by needs like pets and toilet/wall distances.