Hi Cookie,
This isn't exactly the solution you're looking for, but one I am using for a somewhat similar situation. Thought perhaps it might work for you, at least until there is another way.
I have several sizes of gift buckets, each is priced separately and each states how many products it holds, then the customer chooses the size container and then choose the contents from any of our items -our items are at least one pound packages so only a few go in.
Directions for choosing your items for a custom Gift Bucket:
Our LARGE Gift Bucket holds 4-6 items
- Select your bucket color and size. Add it to your shopping bag.
- Shop from any of our products to select the items you wish to add your Gift Bucket. Add each item to your shopping bag.
This would of course mean you need to price each of your chocolates or cookies (whatever you're filling your box with) individually. etc. and each of your containers would need a price even if it is zero.
BTW, what's your site - sounds like you've got somethings I might like to consume
Lee