How to set up a product with several quantity packs, 12, 24, etc?

I'm not sure how to search for this on the forum. I have tried but no one else's question seems to come close to what I'm trying to do.

I sell gadgets that can be purchased in quantity of 1, but they are normally bundled in packages of 12, 48, 144.

So for example, a customer could purchase 1 for $1.50, but if they selected the dozen pack it would be $12, the 48-pack $40, etc.

I do NOT break up the packs, so the "quantity discount feature" really wouldn't work (or would it?) because it would allow customers to purchase odd numbers. I don't want the customer to be able to purchase 20 pcs or 50 pcs.

I need something like the following:
http://wholesalesuppliesplus.com/StoreCategory.aspx?CatalogID=19&GroupID=828&CategoryID=1961&CategoryName=Amber+Glass+Bottles

I like how the above website has the radio buttons. Can this be done in zen cart? If not like website above, then how can something like this be done in zen cart?

Okay, I'll reply to my own post.

It seems like I may need to make each product a sub-category: i.e.

Main Category: Coasters
Sub Category: Dolphin Coasters
Sub/Sub Category: Blue Dolphin Coaster (qty 1)
Sub/Sub Category: Blue Dolphin Coaster (qty 12)
Sub/Sub Category: Blue Dolphin Coaster (qty 48)
Sub/Sub Category: Blue Dolphin Coaster (qty 144)

And give them each their own price.

Is this the only way I will be able to do this?

You could also use attributes to set special pricing on pre-established packs.

Thank you. Attributes worked.

Just took me a while to wrap my head around the Option Names, Values and Attributes because all of those boxes and fill in the blanks were daunting. But it was simpler than I thought.

The reason I didn't originally think Attributes would work was because it seemed like attributes added an amount to the base price. But I set my base price to 0.00 and it works.