Replacement jars are available in 5-cup and 6-cup sizes that fit most Oster blenders. Four-cup, 7-cup and 8-cup jars are also available for a few specific models, as of 2015. Visit Oster's website to purchase a replacement online.
Standard 5- and 6-cup glass replacement jars come in glass or plastic and are available with and without lids. The glass and plastic jars are both dishwasher-safe, and the plastic one is also BPA-free. The glass is thermal shock tested and capable of resisting damage from drastic temperature changes.
The Versa series offers 4-cup and 8-cup plastic jar options. Lids and other accessories are sold separately.
For standard Oster blenders, the additional parts can be purchased as a Blender Refresh Kit, which is available online from Oster. As of 2015, the kit costs $11 to $13 and includes the lid, bottom cap, blade and two sealing rings. Standard parts are also sold separately.
Versa blender parts are not sold as a kit, but Oster does offer a Versa food processing kit for $35 to $59 that fits Oster Versa blenders and includes a jar, blade, cutting disc, lid and tamper.
In addition to the standard accessories, Oster also offers specialized milkshake and ice crushing replacement blades that fit most blenders.