An ancient Roman glass bowl. Roman glassware, produced from the 1st century BCE to the 5th century CE, is known for its innovation and artistry, and bowls were commonly used for various purposes. The bowl, crafted from glass, would showcase the advanced glassmaking techniques of ancient Rome, such as free-blowing and mold-pressing. Roman glass often exhibited a variety of colors, including shades of blue, green, and amber, due to the minerals present in the raw materials. Ancient Roman Glassware Collectibles.