The idea of sharing breast milk might gross some of you out.
But women are quietly doing it all over the country.
And for mothers' that have trouble breast feeding - donor milk can be a huge help.
So could milk banks be the answer?
They used to be common in New Zealand, but disappeared about 30 years ago.
Now a Christchurch group is trying to set one up, and they could spread further.
So how do they work? And are they safe?
Helen Vaughan reports.