1Short for 'mug' (mug cup): a relatively large cup with a handle used casually for drinking coffee, tea, etc.
毎朝、愛用のマグでコーヒーを飲むのが習慣だ。
I have a habit of drinking coffee every morning from my favorite mug.
オフィスでは自分のマグに名前を書いておく人が多い。
In the office, many people write their names on their mugs.
旅行用の保温マグを買ったので、出先でも温かい飲み物が飲める。
I bought a thermal travel mug, so I can drink hot beverages while out.