The unspillable Mighty Mug, perfect for use with single coffee makers such as Nespresso Machines. These revolutionary mugs will not fall over if accidentally knocked. Powered by their "Smart Grip" technology the Mighty Mug grips firmly when sideways pressure is applied, but lifts easily when vertical pressure is applied. Meaning you cannot knock them over by accident, but when you want to take a drink you simply lift up as normal. Double wall insulated to keep hot drinks hot and cold drinks cold.