This is a hiball shaped mug featuring a whale with harpoon in its mouth on front. It is marked "The Harpoon" on front and "Pioneer Inn Lahaina Roadstead Sandwich Isles" (which is what the anchorage between Lahaina and Lanai is called) on reverse. The Pioneer Inn was owned by the Spencecliff Corporation. The Spencecliff group also owned the Tahitian Lanai and the Lahaina Broiler and Prince Kuhio's. On bottom, this mug is marked "Ye Olde Grog Shop" and "SSS" for Sunset Shore Studio. Adele Davis's Sunset Shore Studio made ceramic mugs for several restaurants among the Spencecliff group.