What is blue in color and tastes like summer? Blueberries. What tastes like summer and can be easily carried around for convenience? Blueberry Jam Cookie by Sad Boy E Liquid. For vape juices, one of the marks of quality lies in their ability to convey authenticity and originality. Sad Boy E Liquid claims that their recent addition Blueberry Jam Cookie is highly representative of this fact. This e juice is a concoction of both fruit, dessert, and breakfast jelly. Think back to a summer at the farmer's market, baskets bursting with fresh blueberries. Sad Boy E Liquid takes the most succulent of this fruit and churns their juice into a fresh sticky jelly. Your local bakery has got nothing on the cookies that make up this e juice.