BACKIG glass bowl set, black, 14 cm, 4 pack

"In glass production, you always get a certain amount of scrap," says Daniel Stjernqvist, an IKEA engineer who's specialised in glass for many years. "Sometimes, material is cut off to create a finished product, and sometimes it breaks or has something wrong with it – like a bubble or a defect – so it's rejected. This is then crushed and goes back into the furnace again to melt,” explains Daniel.

Clear glass can be reused to make clear glass, but the dusky, deep purple tint of BACKIG is characteristic of when different coloured glass is melted together and reused to make something new. The result is so dark it's nearly black, which is why it's often called "black glass". "Black glass is an affordable alternative to black stoneware since it's less expensive to produce. For us it makes sense to use a material that already exists – it's safe, saves energy and money – so why not do something good with it," says Daniel.