This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. as much as a mug will contain

n. the quantity that can be held in a mug.

n. the quantity that can be held in a mug

"When it was ready, she poured a mugful, took a deep breath, and brought it out to Nick."

containerful   

mug   

sixpack    six-packs    half-cup    slurp    theamount    pekul    saucerful    pannikin    six-pack    thermos