I think I just found my favorite restaurant in the world: Modern Toilet. There are multiple branches in Taiwan, but the one I went to was located at Ximen in Taipei. You can exit the Ximen MRT stop to get there. It's a quick walk from there.
The premise of the restaurant is.... well, the toilet. All dishes are served in either a small model sit down toilet or a small model squat style toilet. For 30 NT (about $1 USD) you can also have your drink served to you in a urine bottled used in hospitals which you can keep. I assume they are not used.
I ordered the beef curry meal which included some green tea and a ice cream dessert (not pictured yet0 in a squat toilet bowl. In all it cost me about $7 or $8 USD.
The girls sitting next to me ordered this huge ice cream and flavored crushed ice with fruit dessert, also in a squat toilet model. It looked delicious, but I was afraid I might get sick from the fruit and ice.
I assumed the food would be terrible and the draw would be the toilet theme, but I was only half right. The food was not bad at all, the bigger desserts looked delicious, and I was the only one that seemed to care about the toilet theme, the locals were ambivalent.