In Wallonia CPAS may offer options for receiving nappies and free or discounted food, depending on the commune. It is encouraged to visit and ask at your commune about taking advantage of the services they offer, particularly in regards to specific things such as receiving free nappies, food or at a reduced price or other supplies.
In Flanders OCMW depending on the commune provides options for free nappies and discounted or free food.
"Resto du Cœur - L’Autre Table," offers complete, healthy and balanced meals at lunchtime at affordable prices to those in difficult situations, as well as breakfasts on Mondays and Fridays. http://www.restosducoeur.be/nl/
The Social Protestant Center in Brussels has a restaurant for cheap meals everyday at lunchtime. (http://www.csp-psc.be/services/babbelkot)
Also, NASCI (dienstencentrum voor het kind/ centre d’aide à l’enfant) offers material support to pregnant women and mothers. After they assess your request for support, you may be eligible to receive free items such as nappies, but also baby formula, school supplies, etc. Find more information here http://www.nascivzw.be/index.html