How to sterilise a flask??

[Amyrobbo1794]

Hi Guys,
First time poster!
I have been out today and bought a flask for when we go on days out etc. with DD (9weeks) and I have no idea how to sterilise it? I have a tommee tippee steriliser but it wont fit in there (obviously!) when I thought it would
I have googled it and it just keeps coming up with suggestions on how to clean a dirty flask, so no use to e at all!!
All advise and tips welcome

Boiling water, shake it and leave for a bit. Alternatively, fill it up with miltons and let soak for 15 minutes and rinse with boiling water after.

I don't think you need to sterilise it if you are only using it for boiling water as the hot water will sterilise it for you

Can you not take ready made cartons out with an empty sterilised bottle?

If you've bought it to take boiling water out then it sterilises it for you !

Yes it's just for carrying boiling water, thabks for the advise 😁