This is a beautiful Kyusu Teapot by CookVessel, a Japanese company known for their brightly colored aluminum tea service pieces.
A kyusu is a traditional Japanese teapot made of clay. Its iconic characteristic is that it has one side handle. Although kyusu refers to all teapots in Japan, the term refers to Japanese side-handled teapots in the West. While an authentic Japanese teapot (kyusu) is made from high-quality clay, it is not uncommon to see some variations—notably, porcelain and glass kyusu. Porcelain ones are usually used for tea tastings.