Do you have a citation for “4.75 servings?” The one thing from 2010 I could find has a serving size of one can.

https://www.fatsecret.com/calories-nutrition/four-loko/four-...

At 12% ABV, a serving size is 5oz.[0] There's 23.5oz in a FourLoco.

IMPORTANT EDIT: Apparently these labeling changes were made specifically due to a lawsuit against FourLoco.[1] So you're totally right, a serving was 1 can, despite having almost 5 drinks worth of booze.

[0] https://www.niaaa.nih.gov/alcohols-effects-health/overview-a...

[1] https://www.ftc.gov/news-events/news/press-releases/2013/02/...

An yet you can still buy cans of other malt drinks with even higher ABV and volume.

An aisle over, you can by 1.75L of vodka for $9.99. That is 40 servings!

A major difference is that bottle of vodka can be closed after being opened.

The malt liquors usually can't.

An aisle over the other direction has micro brew IPAs with even higher ABV