Sienna Miller and Jude Law are really on a honeymoon mood in Italy. After being spotted at the beach, the couple, who is on vacation in Ponza, took advantage of the hot weather to buy some refreshments in the local market. In the shopping list: lots of water and that good old beer. With their I-don’t-care fashion style – Jude wore tees and Sienna, short-shorts and a loose top – they were only smiles. Ah, the Summer…