Plastic boxes and stack them in your fridge to be used over the next few meals.
It is not like every plastic container releases harmful chemicals so no need to panic, just yet. Good quality containers have a #2, #4 and #5 printed at the bottom, these are considered safe for food storage. But since it’s tough to guarantee the quality of plasticware purchased, some people stay away from them completely, opting for glass or steel containers instead. “I definitely endorse steel and glass containers. Children can easily take steel boxes to school! Steel water bottles are also easily available. If the plastic containers are BPA free then they can be used. Thin plastic mineral