I went to Japan in this August. I put the formula milk to 2's re-closable storage bags (like Ziploc & Glad) which was packed to the baggage. It can save your place in suit-case when you return. In the last year, I brought a can. I still needed to pack in a storage bag and added a sticker tape.
If your baby drink fresh milk, you can easily buy the fresh milk in the supermarkets or convenience stores.