Reusing bottles is a good way to save money and reduce your amount of waste. If you are planning to use these bottles for drinking, however, you should sterilise them so that you don't expose yourself to viruses or bacteria. Baby bottles also should be sterilised periodically. One of the easiest methods of sterilising bottles is to boil them. Boiling the bottles is an effective means of making sure that they are safe for use.
Place the bottles into a pot. Cover the bottles with several inches of water. Place the pot on a burner on high heat.
Boil the bottles for at least five minutes to sterilise them. Begin timing the boiling once the water begins to boil, not when you first turn on the stove.
Remove the bottles from the pot and place them on a clean towel or drying rack to dry.