You can generally carry packed food in your cabin baggage, but it must adhere to strict security guidelines regarding liquids and gels. Solid foods like sandwiches, fruit, nuts, and dry snacks are perfectly fine to bring through security. However, any food with a liquid or creamy consistency—such as yogurt, hummus, jam, or soup—must be in containers of 100ml (3.4 oz) or less and fit within your single quart-sized clear plastic bag. International travel may also have customs restrictions; for example, many countries prohibit bringing fresh produce, meat, or dairy across borders. It is always best to consume perishable or restricted items before landing to avoid potential fines.