When Lily Allen’s posse of twerking dancers puffed on some green-tipped E-Lites, e-cigs had arrived. However, the industry is expanding so rapidly competition is fierce, with hundreds of brands springing up. And questions are now being asked about their safety, with the government wanting to regulate them as medicines.

Read this: E-cigarettes: everything you ever wanted to know

Read The Grocer’s Review of the Year 2013.