How to say “Save that coffee mug for me, please; I'm just finishing my lunch.” in Japanese

In Japanese

そのマグカップ、私(わたし)の分(ぶん)に取(と)っといてくれる？もうすぐお昼食(ひるた)べ終(お)わるから。

Sono magukappu, watashi no bun ni tottoite kureru? Mō sugu ohiru tabeowaru kara.