The Flask is a highly engineered object made of food-grade steel, carbon fiber, and aerospace-grade aluminum, making it very strong and durable.
Other features of the flask include a rubberized bottom for non-skid grip and a small rectangular air vent on the side of the funnel allow for ventilation.
The Flask is available for purchase from The Macallan online shop for £600 ($900). You can check out a video of it being tested below (Failed the drop test. At 2:01 you can see the bottom falling apart).