One thing to keep in mind is that the flowers end up being somewhat tall so might not be the best for mailing on a card.
Here are some I have been making:
One of the best Christmas gifts I got this year was a pair of Vintage Owl Salt and Pepper shakers. They inspired me to look for more vintage S&P shakers. These are some very retro cool ones.
http://www.etsy.com/listing/65301645/sweet-pair-of-vintage-deer-shakers-made
http://www.etsy.com/listing/65225617/vintage-1950s-siamese-kitty-cat-salt
http://www.etsy.com/listing/64346530/vintage-bird-salt-and-pepper-set
http://www.etsy.com/listing/65171306/1950s-vintage-japanese-ceramic-raccoon