Christmas Orchid

This orchid flowered just before Christmas it is quite a small flower but pretty, a friend gave it to me,, it is planted in a glass vase,  she has given me 4 planted this way, and I am not quite sure about the watering of them.  The other ones I have I put for an hour every week.  I was pleased that this one is still producing flowers  there are lots of buds on the plant too.