Fire King Stacking Mug D Handle Jadeite Jadeite, a representative color synonymous with Fire King. This is a D-handle mug, highly popular even in vintage. Differences exist depending on the year of manufacture, etc. The left one is slightly thinner and lighter. 228g The right one is slightly thicker and heavier. 289g Even if two people use them, there are differences in appearance, making them easy to use as personal mugs.