Thong Smith is a boat noodle shop inside Terminal 21 Asok, near Asok Station in Bangkok. It serves wagyu noodles in a rich beef broth with wagyu ribeye and tendon, and you can add egg noodles, cilantro, and bean sprouts. The shop also sells fried bananas. Lines are long inside Terminal 21 Asok because the shop draws a steady crowd, and the noodle bowls are small.