In a non-Teflon quart pan add ¼ cup sugar, ¼ cup of water with the 2 pints of blueberries. Cook over medium heat until the blueberries burst, stirring until it develops a syrup-like consistency (approximately 5-10 minutes). Transfer blueberry mixture to blender or use an immersion stick to liquify. Run contents through a fine strainer reserving blueberry syrup.
Take ¾ cup of the strained blueberry syrup and add to a 2-quart saucepan. Add in 3 ½ cups of heavy whipping cream, then add in remaining sugar. Take two Tbsp of heavy whipping cream, mix in a small bowl with the packet of gelatin till gelatin has dissolved, then set aside.
Heat blueberry and whipping cream mixture till it is simmering or just starting to bubble. Remove from heat, and add dissolved gelatin, blending until thoroughly combined.
Pour into fancy stemware, such as wine or martini glasses (I prefer martini glasses as it provides a nice presentation). Place in refrigerator to set overnight.
When serving, take remaining blueberry sauce, float or pour a tablespoon over the panna cotta, then serve!