These are wonderful planters.  I also have two of the tall ones on my front porch on each side of the door.  They stay outside all year around and still look fantastic.  I first year I had these I didn't empty out the water before winter.  The water froze and expanded and the planter bubbled out at the bottom.  I was so upset, thinking I had ruined them.  However, after the ice melted the planted regained it's original shape!