I have been exclusively breastfeed JackJack for 6 months+ and it's still counting.
6 months might be just 'sap sap sui' for those mothers that b/fed for 2 years! But, believe me, it is not as easy as you think. I experienced many issues throughout this 6 months and until today i'm still having problem with it. Plus, restless nights to express milk. Well, EBM is the best for JackJack, so, no complaint =)
Just to share that some mothers even come out some 'grading' based on the months you have breastfed.
3 months - Certificate
6 months - Diploma
1 year - Degree
18 months - Master
2 years - PHD
So, i'm a diploma holder now =)
Anyway yesterday i have thrown away 27 packs of milk in storage bags coz it's been stored inside freezer for > 3 months. Each storage bag have averagely 5oz milk. So its ~135oz or ~4000ml!!
It's averagely 5oz per pack

This is how it looks when all milk-cube melting inside the sink

Leftover... after the 'housekeeping' of throwing away expired milk