One thing with home drinking is the head on beer can quickly go, whereas a true pint of 'real ale' in a pub is a totally different type of beer and the head tends to stay longer.
The cosmetic beer I drempt up this morning has a washing-up detergent head and therefore stays for a long time. The photo was shot about 10 minutes after pouring and still looked good. Even when I packed away after editing, some 20 minutes the head was still intact but began to have larger bubbles so was looking a little fake.
The reason for the 10 minute delay was movement of snoot, centreing and finalising the shot.
I recommend this artificial beer this type of beer shot as it allows time to get the right shot.
The glass sort of selected me as I found it in my carry-on luggage when I arrived home and I have no idea how it got there