Many times, we take the importance of toilets for granted. Nearly 20% of the world’s population does not have access to a suitable toilet, but there is no denying that a toilet can significantly improve the quality and comfort of life. Let's take a moment to review a few interesting facts about toilets:

1. Arthur Giblin is believed to have invented the first flushable toilet.

2. The oldest known toilet is still in use about 4,000 years after it was built. It is located in a small castle in Knossos, Greece.

3. If you want to see the most expensive toilet in the world, you might have to go to space. It's installed on the International Space Station. It costs about $19 million.

4. In 1890, the Scot Paper Company was the first to produce toilet paper on rolls.

5. The World Toilet Organization was founded on November 19, 2001, and this day is World Toilet Day every year.

6. Be careful! Toilets are indeed prone to accidents. King George II even died in 1760 after falling off the toilet. Nearly 40,000 Americans are injured on the toilet every year.

7. No one can avoid going to the bathroom. We go to the bathroom about 2,500 times a year.

8. In China, there are public toilets specifically for dogs.

9. The original meaning of 'toilet' is "to wash, dress, and prepare", which comes from French.