This cooler is rectangular but slightly rounded inside and out. The inside dimensions from their shortest points are 9.5" x 12" wide x 8.25"" tall. Add about an inch to each of those dimensions if measuring from the longest points. Forget about putting a wine bottle in it; it's not designed for that. It holds 12 to 14 Dasani half-liter water bottles upright, Dasani bottles being 8" tall. SmartWater bottles, which are 8.5" tall, will fit upright in the center but are too tall for the edges. The outside dimensions are 11.5" x 14.5" x 11" tall. The handle is not really ergonomic; it's thin and hollow on the edges giving it a sharp feel, not nearly as comfortable as Coleman's Oscar line from the 1980's. Suggestion to Coleman: If I were designing this cooler I would make it square and a little larger, e.g., with inside dimensions of 13" x 13" wide x 10" tall. I would also make it with a detachable lid and molded handles like some of Coleman's older coolers. Then it would be a 5-star cooler.