Iris in a bottle, sketch in oil on linen

I found a little glass milk bottle in the basement today, and I thought it would be perfect to put an iris bloom into, and do a sketch. This was a quick sketch, I wanted to try and use as little paint as possible, scumbled thin with no medium, on a linen panel. I sketched it all in using burnt umber, and then added color with alizarin crimson and u. m. blue, white and some yellow. I wiped it off afterwards, it was just for practice. It taught me something though, I'll try this method again.