Figure 1-9. Parts of a can.
1-17. GLASS CONTAINERS
Modern technology permits the production of glass that is competitive with other
container materials in function and strength. Components of a glass food container are
the body, the bottom, and the closure. See Figure 1-10. The finish is that part of the
glass container that holds the cap or closure. The glass lug is the threads or glass
protrusions found in the area of the finish, which are used to hold on the closure. Glass
containers are not harmful to food products, but the closures may be. It is sometimes
difficult to find material that seals to the required tightness, is inert to the product, and
can be stored satisfactorily.