Identification help! Little Aussie "Coco Snails"

There is a company based out of Austrailia that sells little "instant pets" like brine shrimp / sea monkeys (that they call "Sea Dragons"), and other varieties of tiny desktop pets:
http://www.littleaussieproductsshop.com/aboutus.asp
Among their selection is a marine snail they refer to as the "Coco Snail".
I am just wondering if anyone has any leads as to teh type of snail this actually is? They say that these can be shipped anywhere in the world because when out of water they retract back into their shells and can survive this way during shipping. They sell another type of snail they refer to as the "Winkle" which is a purple shelled snail that I found out is actually a Pyramid Periwinkle, commonly found in the vernal pools on the Austrailian shores. Im assuming the Cocos are found in this same area as well.
The reason I want to find out the species of Coco snail is that both of the snails this company sells can be kept in the same tank as Sea Monkeys, but the purple periwinkle likes to try to excape crawl up to the lid and all over the place. The Coco one stays underwater and would make a perfect addition to my desktop Artemia tank at work but I dont want to pay for teh insane shipping costs from Australia just for a couple tiny snails.
here are reference pictures:





thanks in advance!
Jamie
http://www.littleaussieproductsshop.com/aboutus.asp
Among their selection is a marine snail they refer to as the "Coco Snail".
I am just wondering if anyone has any leads as to teh type of snail this actually is? They say that these can be shipped anywhere in the world because when out of water they retract back into their shells and can survive this way during shipping. They sell another type of snail they refer to as the "Winkle" which is a purple shelled snail that I found out is actually a Pyramid Periwinkle, commonly found in the vernal pools on the Austrailian shores. Im assuming the Cocos are found in this same area as well.
The reason I want to find out the species of Coco snail is that both of the snails this company sells can be kept in the same tank as Sea Monkeys, but the purple periwinkle likes to try to excape crawl up to the lid and all over the place. The Coco one stays underwater and would make a perfect addition to my desktop Artemia tank at work but I dont want to pay for teh insane shipping costs from Australia just for a couple tiny snails.
here are reference pictures:





thanks in advance!
Jamie