Analisando as regras do aeroporto, como aquelas para Heathrow
Can I carry liquid baby food, prepared milk, soya milk, rice milk or sterilised water through security?
Yes, if you are travelling with a baby or infant you can carry a reasonable amount of liquid and liquidised food for the baby or infant infant for your journey. To assist security screening, please do not carry these items in a flask. Spare supplies must be packed in your hold baggage.You can either carry the liquids as part of your liquid bag allowance in which case the standard liquid rules apply or alternatively separately in containers over 100ml. Following x-ray screening, security officers may also need to carry out additional checks on these items.
Se você pretende levar suprimentos para durar mais do que os necessários para o voo, é provável que você tenha que embalar esses itens extras na sua bagagem despachada, dependendo dos aeroportos de onde você estiver viajando.