This is a non-profit collaboration between Happy Life Welfare Society and The Dabbawala Foundation. Dabbawalas provide great services without any technological backup. Share My Dabba is an initiative to get food left uneaten in tiffins to hungry street children, using the dabbawala network.
All you have to do is put a Share sticker on your dabba if there is any left food in it. The sticker allows the dabbawalas to identify the ones Shared from the empty ones & use it to feed children. Here is the FAQ‘s on how the process is done.