Shelf-stable snacks like chips, pretzels, protein bars or any other items packaged in sealed wrappers are permitted on every major cruise line. Just stick with store-bought goodies including candy, savory snacks, cookies or granola bars instead of whipping up a batch of homemade muffins or sandwiches to bring with you.

Yes, you are generally allowed to bring snacks on your cruise, provided they follow the cruise line's safety and sanitation policies. Most major lines like Carnival, Royal Caribbean, and Norwegian allow passengers to bring non-perishable, pre-packaged, and factory-sealed snacks in reasonable quantities. This includes items like granola bars, chips, crackers, candy, and nuts. Bringing your own snacks is a great way to manage specific dietary needs or to have familiar treats for children without paying for room service. However, you are strictly prohibited from bringing "home-cooked" items or any fresh, unpackaged foods like fruits, vegetables, or meats, as these pose a significant biosecurity risk and could violate international agricultural laws at various ports of call. Additionally, you should be mindful of storage; most cruise ship cabins have small coolers rather than powerful refrigerators, so items that require consistent cold storage might not stay fresh. It is also important to remember that most food on a cruise is already included in your fare, so you may find you don't actually need to carry much extra weight unless you have very specific brand preferences or dietary restrictions.