It’s kind of hard to find good bagels in Hong Kong without too much chemicals. Recently, I have discovered some in M&S. They are quite easy to get as M&S Food have shops in many places now.
No E470, E471, E472 or E481, etc!!! I love their sesame bagels.
They also have other kinds.
If you cannot finish 5 bagels within a few days, you can put a few in zip bag and freeze them in freezer for weeks. Before you eat, just take one out, leave it in room temperature for 30 mins and toast.