Short answers, pulled from the story.
The modern Maß has settled at a specific fill line slightly above one liter. This fill line accounts for the foam head that must expand above the liquid, ensuring the drinker receives the exact amount of liquid beer they paid for.
Switzerland utilized a Maß of 1.5 liters between 1838 and 1877, and Baden maintained that larger volume until 1871. The modern Maß has since settled at a specific fill line slightly above one liter.
An empty Maß weighs enough to generate a force of 1,500 Newtons in a violent blow. This figure far surpasses the 1,000 Newtons required to break a human skullcap.
The current world record for holding a filled Maß at arm's length stands at 45 minutes and 2 seconds. Participants must hold a filled Maß at arm's length for as long as possible in the endurance sport of Maßkrugstemmen.
Patrons can rent space to store their mugs for a small monthly fee in establishments like the Hofbräuhaus am Platzl in Munich. The establishment will wash the mug for them, ensuring it remains clean and ready for future use.