Vtg Otagiri Hot Air Balloon & Rainbow Mug with Gold Highlights Large Coffee Cup

Large rainbow and hot air balloon mug by Otagiri of Japan. Vintage coffee cup. Approximately 4 3/4” tall and 3 1/8” wide (not including handle). Condition: handle well attached, no chips or scrapes. 2 small glaze bubbles in cloud, possibly manufacturing flaw (see photo). *not microwaveable