The average fridge in the UK is set 2°C too warm. This causes food to spoil 3 days faster than if your fridge is set to the correct temperature – below 5°C – and leads to the average UK family producing 117kg of food waste every six months: half of which goes to landfill, creating large amounts of greenhouse emissions. Running their fridge too warm also costs the average British family £780 a year.  

The Smart Jar reimagines Hellmann’s iconic mayonnaise jar by combining it with a label made with cutting edge thermochromic ink technology. The jar features over 30 custom illustrations, which appear and disappear depending on whether the jar is above or below 5°C – making it easy for anyone to know if their fridge is too warm, and prompting them to turn it down.  

In the first 48 hours after launch, the Smart Jar was covered in the UK’s largest media outlets, including the BBC, The Sun and The Daily Express.