1.By chiseling a BOL on a surface of a lens, a apochromatic system is composed, which actualizes the system's apochromatism, as well as revising primary aberration.
2.And for the more adventurous, there's 'spag bol' – spaghetti bolognaise - a budget-friendly bowl of minced beef cooked in a tomato sauce, served on a bed of spaghetti.