After spend 2 days 1 night in Copenhagen , Demnark . The next early morning depart to Frankfurt, Germany by flixbus but Transit 2 hours at Hamburg to change to Flixtrain. From Hamburg bus station to Hamburg Train station takes 10 minutes walking distance . Dont worry about food there are a lot food store in the Hamburg Train station . You may choose there . Sometimes train in Germany delay . Just be alert maybe there change the platform and you need to rush to other platform to catch the train . Otherwise you will miss a train .