We are packing - yay!! - and were wondering if opened bags of snacks are allowed on board. I see that "Homemade, precooked or perishable foods or open food containers." are not allowed. If I have a bag of sunflower seeds that I don't finish on the flight, can I bring the opened bag of sunflower seeds onto the ship? Also will have some almond milk for my son due to allergies (we also have a couple just in case). Should that be in the check in bags or carry on bags? Thanks!!