saintsaver.com has the lowest prices:

 

For Saint Saver™ Washer Rack customers:

$20 per box of 20 cups  

	If cups are shipped with Saint Saver™ Washer Racks, the shipping cost = $3 per box.
	If cups are shipped separately from Saint Saver™ Washer Racks, the shipping cost = $10 for the first box plus $5 for each additional box shipped with the first.

 

For non Saint Saver™ Washer Rack customers: 

$25 per box of 20 cups plus $10 shipping for the first box of cups and $5 for each additional box shipped with the first.   

Simple and elegant, Broadman brand glass communion cups.