Fake beer! Go wash your mouth out, at once, use the stuff you have thoughtfully provided for yourself in the glass.
I can understand the thought process, and know exactly what you mean about it gong flat quite quickly. I'd have tried it with beer, got the lighting right. Had a break, whilst emptying the glass slowly, after a suitable pause, refilled and taken the final shot.
If you're going to take a glass for each type of Belgian beer you drink, you'd better get bigger luggage. It's part of the brewing culture that each beer has its own distinctive glass, it's all part of the marketing. There are bars in Brugge that serve over 300 different beers. That's a lot of glassware if you're going to continue collecting. You can get Leffe glasses in presentation packs in most decent off-licences at this time of year. I suggest Oddbins if there's one near you.
Later edit:
There is clearly a different texture to the head of
Real Leffe Brune. Who needs flash anyway? Quarter second, hand held. I like my new toy.
Much later edit:
How did you end up with the Lambrini glass then? That must be a far more shameful tale.