I think, the best thing you can buy when the baby is taking bottle feed is to get a steriliser. You can wash the bottles and then put them inside the steriliser to have them clean off all the possible germs.
Or if you do not have a steriliser, you can wash the bottles and then put them in the boiling water pan, and let them be in that water for a few minutes. Then take them off, let them dry and use fro the next feed. Repeat it, before every feed. You must sterilise the bottle after each feed.
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