A xun (pronounced like "sin" but with a Z sound) is an ancient Chinese vessel flute with six holes tuned to a pentatonic or personal scale. It is top blown like a coke bottle and is about the size of a coffee cup.

These so far un-named things are about the size of a lemon or a small egg, are side blown and use a modern four hole diatonic scale.

I've been calling them vessel flutes but some folks call them ocarinas. Technically, an ocarina has a fipple and an airway, but these do not.

This first photo is my smallest, as you see by the quarter, using the British four hole system I can play a full octave, but no one but me has been able to get the top note out of it yet. You have to close your eyes and wish with all your heart to make that note!

This next one has a light green dusty underglaze with incised vines. It is about the size of a small key lime and has no base. It fits in my hand with my fingers closed and plays a full octave with a rich tone and a slight burr which complements the E Sharp tuning. I've sent it to a friend of mine who found it nice with a slight breathiness he was not used to. I suspect it is edge noise caused by blowing harder than necessary. In general, I tell people to blow on their finger from about two inches away, and if they can feel it they are blowing too hard. Here is how to hold and play one.