Her 'sustainable' fridge works through evaporation and can be used to keep perishable goods such as milk and meat cool for days.
Without using any power, temperatures stay at around 6c.
The fridge comprises two cylinders - one inside the other. The inner cylinder is made from metal but the outer cylinder can be made from anything to hand, including wood and plastic.
Miss Cummins, from Keighley, West Yorkshire, said: 'A fridge is something that people can't seem to live without.
'I wanted to keep it really simple and so I set about researching how we cooled things years ago. The simplest method of cooling something could be seen when you look at how we cool biologically - through sweating or evaporation.
'That idea led me to the design and the fridge was born.'
After her A-levels she spent five months of her gap year in Africa, perfecting and demonstrating her product. In Namibia she became known as 'The Fridge Lady'. Miss Cummins returned to the UK to start a business management course at Leeds University.
She had been refused a place on an engineering course because, to her dismay, she didn't have the correct qualifications.
Last year she met the Queen at Buckingham Palace after being invited to a prestigious women in business event
Emily Cummins holds the portable eco-fridge. It can keep perishable goods, such as milk or meat, cool for days at a temperature of around 6C
Emily with her grandfather Peter Harrison, 78, in his potting shed where she created the fridge
