Daft bottle questions

This has probably been asked a million times before!

My mum is babysitting for us tomorrow and I can't express enough for the day and she can't see to measure the water into bottle.  Can I just fill the bottles and leave them out? If so do they need to go in the fridge or can they be left on the side?  She had formula when we had feeding issues and had it at room temp so luckily mum won't have to deal with heating up.

I'm sure I have read not to add the formula until it is meal time, is that right?

TIA xx

hi i do all my waters for the day and leave them on the side as she has it room temp xx

WQAS

Fill the bottles with water and just get her to add the powder to make up the formula fresh when it's needed. To make it really easy for her you can get little pots so you can measure out the powder ahead of time and all she has to do is add the two together.

TY both :)

I have one of the pots somewhere.  I need to try and find some right size teats in the morning as well.

Quite excited about a day out with H.