Great question! Typically the tea bowls have a beautiful design on the front so it's common to turn it to face the guest as you hand it to them and then the guest will turn it so the front faces outward. That way the most aesthetically pleasing part of the bowl is facing towards the host and remains undamaged.
![《茶道点前集》風炉・薄茶点前 Sadou [Japanese Tea Ceremony]（裏千家）](http://i.ytimg.com/vi/HEeAlmN9-BU/mqdefault.jpg)
How long have both the host and guest been studying Chado when this video was made?
what does it mean to turn the cup before handing it to the other person or drinking the tea?
Great question! Typically the tea bowls have a beautiful design on the front so it's common to turn it to face the guest as you hand it to them and then the guest will turn it so the front faces outward. That way the most aesthetically pleasing part of the bowl is facing towards the host and remains undamaged.