This Essex-based company sells and leases shipping containers, ranging from 6ft to 40ft. It also converts them into buildings such as mobile offices, cafes, football changing rooms, and workshops for community projects. Its containers are used by eBay and Amazon sellers to store dry foods and other stock. It also supplies customers such as the Red Cross, the Ministry of Defence, the police, and Thames Water. 1st Containers was founded by Mitch Brenner in 2004 and reported sales of £24.9m last year.