The offer of Zagreb shops includes products made of crystal, ceramics, and porcelain, wicker or straw baskets, and top Croatian wines and gastronomic products. Famous Croatian souvenirs are ties (cravats), a fashion accessory named after Croats who wore characteristic scarves around their necks during the Thirty Years' War in the 17th century, and a ballpoint pen, a tool invented by a Zagreb inventor Slavoljub Eduard Penkala. Among the gastronomic souvenirs, the most famous are paprenjak, a traditional biscuit whose history dates back to the Renaissance, olive oil, cheeses, and wines.