2. Head tilt.
WRONG WRONG WRONG WRONG WRONG.
At this angle, the "beer" will be hitting the top of your mouth on the way in. Use less head tilt and more bottle tilt.
For more experienced drinkers, there is a cross-under manoeuver - we star with the head horizontal, and the bottle not even horizontal.
As drinking continutes, increase the bottle angle, past horizontal, and further. About 75% of the way through the drink, the bottle should be around 45 degrees. At this point, start tilting the head slightly downwards. This is the cross-under. By the end of the drink, the bottle will be almost at right angles to the head.
Now, this technique has added advantages - not only is it more efficient, but with your head always horizontal or tilted downwards, then you can be looking to see where you want to go next. Perhaps where you are skiing is a wide run, whereas, you'd prefer to go over to something a bit thinner, maybe with a couple of big bumps. With the correct head angle then it's possible to see where your next move will be.
You need lessons.