Emma Bridgewater Mug - Blue Iris Emma Bridgewater Sale! from $39.00 Qty. Add to Cart A blue iris stands for hope - maybe the hope that someone else will make you tea for a change in your Flowers Blue Iris 1/2 Pint Mug? Volume: 1/2pt or 8 ozMaterial: Earthenware. Microwave safe, dishwasher safe, oven safe, freezer safe.