Instant noodles are very cost-effective. You can eat it with boiling water for a few minutes, but you will definitely be malnourished if you eat it for a long time. You must eat more fruits.
2. Self-heating hot pot and self-heating rice
Self-heating hot pot and self-heating rice not only have noodles or rice and meat dishes, but they are definitely much more delicious than instant noodles, but you should pay attention to safety and be careful of burns, and the ingredients inside are definitely not fresh because they are stored for a long time. Better eat less.
3. biscuits and bread
These can be eaten as breakfast or afternoon snacks with a can of milk.
Summary: If conditions permit, I suggest you buy a rice cooker yourself. Usually cooking noodles or porridge is also very convenient and cleaner.