I got my mum a few of these for Christmas, then had the whole family saying "Where did you get those? Will you get some for me...?"
So, I was checking out prices today, and I saw that the colour changing ones are on special offer from play.com for only £4.99 per pack of 2. These are £8 + delivery at all the other gadget type stores, so this is a very good price indeed :) I've ordered quite a few.
Details: * Includes 2 spa lights * Glows numerous colours: Blue, Pink, Turquoise, White, Red and Green * Batteries: each light requires 2 AAA batteries (not included) * Duration: 120 hours approx. Individual spa light size * 7x7x4.5cm * Removable large sucker on base to stick on bath or tiles