Wouldn't this be a tipping hazard for regular mugs? I've had real manjuu and they can be pretty hefty.
That’s why you use two: for balance.
Use the Small Yukkuris for Cups by attaching the metal clips on their mouths onto the edges of cups!
With this, you can enjoy their cute wiggling to your heart's contents!
When hot beverages are poured into the cup, the wiggling would become far more intense, so this usage is more recommended!Small Yukkuris for Cups!!