What are bamboo hearts?

If possible, a picture would be greatly appreciated.

felan2016-12-18T17:28:25Z

Bamboo Hearts

HJW2015-07-26T09:45:11Z

Picture in link below:
http://www.walmart.com/ip/Lucky-Bamboo-Heart-Shaped/38363103

Greedo.....2015-07-25T06:26:53Z

they dont exist.