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To me, the object in question looks more like bronze (or some mixture) than copper.

Looks like brass that needs cleaning to me. Brass is yellow hued & if clean looks gold colored. Not as bright as read gold metal tho. Don't know what this bowl would be used for tho.

Brass can vary in color from yellow (low brass) to near the reddish color of copper (high or naval brass). The color depends on the alloy content. Low, or common yellow brass has 60% copper with 40% zinc (60/40). High brass has 90% copper with 10% zinc (90/10). Sometimes a 70/30 grade of brass is used in the better quality electrical products.

It is difficult to tell the color of the alloy when it is dirty or tarnished, but experience can help.