Replacing a glass patio table top may be much cheaper than replacing the entire table. If a glass table top is cracked or nicked, it's a good idea to replace it before it breaks or shatters. You don't necessarily have to use glass again. There are several options available.
If you are concerned about using glass again, or just want a different look, a fiberglass table top may be a good alternative for you. Fiberglass can be made to resemble stone, or can be purchased in many different colors and finishes. Fiberglass is lightweight, and will withstand outdoor elements.
Acrylic Table Tops
Acrylic is another common alternative to glass when it comes to patio tables. It is strong and lightweight, and will resist weather and harsh treatment. Acrylic can also be found in a variety of finishes and can be custom ordered to fit odd sized tables.
If you are feeling more creative and have some time to spare, you can create a mosaic table top to replace the glass. This will take a considerable amount of time and materials, but can give you a unique look for your outdoor area. You will need to find a good base, plywood works well. Mortar and a variety of stones can be used for the table top design.