I bought 1 unit of the Z1 - $8.95,
2 units of the Z2 - $12.95 ea
1 unit of the Z5 - 16.95.
Shipping is $7.95 regardless of how many you order.
The bottles are really small, 8 oz so you have to use it sparringly.
Here is the website if you need to order it.
www.zainobros.com