Soap bubble for its soaps in 1886 using a painting by John Everett Millais of a child playing with bubbles. The Chicago company Chemtoy began selling bubble solution in the 1940s, and bubble solution has been popular with children ever since. According to one industry estimate, retailers sell around 200 million bottles annually. A bubble is made of transparent water enclosing transparent air. However the soap film is as thin as the visible light wavelength, resulting in interferences. This creates iridescence which, together with the bubble's spherical shape and fragility, contributes to its magical effect on children and adults alike. Each colour
The North-West Passage was promoting at the time. The female figure was a professional model, Mrs Ellis, who was later used in another painting, "Stitch, Stitch, Stitch" (1876). The right side of the painting originally depicted two of the sailor's grandchildren, who were modelled by John and Alice Millais, two of Millais' own children. They were shown looking at a globe of the world. But after Millais completed the painting, he became unhappy with the figures of the children, thinking that they distracted the eye from the main figure. He cut out this section of the painting and replaced it with a screen,