The Elite collection are a special line of Ball jars available in 8oz half pint and pint sizes in clear glass, and half pint, pint and quart sizes in blue glass. 

The clear jars in half pint and pint size are a squarish shape and come with a decorative silver lid and band.  They come in packs of 4 or boxes of 16 and are not available as singles.
The 8oz jars are a rounded jar which come in packs of 4.

The blue elite jars are the same shape as the standard clear Ball jar of their type.  They are only available in packs of 4.

Elite jars are particularly popular with candle makers and can also be used for gourmet jams and condiments.