This handy gadget warns you if your fridge is open after 10 seconds by flickering and after 20 seconds by flickering/buzzer.

By replacing your normal E14 bulb (bulb most commonly used in fridges) with this device, you can save energy year round. 

The Institute of Food & Agricultural Sciences says that being careless with opening and closing your fridge door wastes 50 to 120kWh a year.

To put that into perspective, 50kWh of energy could run your dishwasher 20 times and 100kWh could run your washing machine 50 times - almost a free load of laundry every week for an entire year.

Wattage: 1.5W (equivalent 10W ordinary light bulb)