UPDATE: After the amazing response the the flask, we are working hard to find a way to bring this to life! Currently we don't have licensing to sell (don't want Disney to put out a bounty on our heads). Please follow our twitter or facebook feed for updates :) If you or your company have licensing and think you can help please email us!
Based on Han Solo's DL44, this is the "Fist Shot" DL4.4oz Blaster Flask. The Silver muzzle is the flask's cap and unscrews to be a 1.5oz shot glass.