Best thing about the MUJI Ultrasonic Aroma Diffuser, put the right oil in and you will sleep like a baby. The first night we used it with some lavender in, we were struggling to stay awake before we’d even turned the light out. It’s also great to put on if you have guests coming round, making any room smell fresh and clean. There are loads of different oils you can get for it. A great gift for those who have everything, pretty reasonably priced at £59.