At the core of every Fridge-to-go® is the patented Cooling Technology.The SURROUND COOLING Technology is used throughout our entire product line. SURROUND COOLING means you're getting the performance you need to keep the contents of each Fridge-to-go ® cold for a full day away from home. SURROUND COOLING also means that when you place room temperature food & drink inside a fully recharged Fridge-to-go®, that it will take less than 2 hours to chill it, working just like your home refrigerator would, sometimes outperforming it!