Selling lemonade when it's -25 ° C in Montreal

In order to have fun outside and bring some heat even if it's so cold right now in Quebec, we decided to start a small business and sell lemonade at the Mont-Royal metro. The challenge was to sell as many glasses of lemonade as there were subzero. As it was -25 ° C, our goal was to sell / donate 25 glasses of lemonade. With friends, I completed the challenge in an hour and we were completely frozen afterwards. When I say glass of lemonade juice, I mean more that after 10 minutes we were selling lemonade slush!