If you bring baby on plane and the bottles with water, that is ok.
We travelled with my baby last year with bottles filled with water.
Canada's water is much difference from Hong Kong, you can check with your friend and ask them to buy bottled distilled water. You mix distilled water with local water day by day until change to all local water.
For bottle sterilization, chu chu and milton has 片裝消毒片, just in case you still want to sterilize your baby's bottles. Some people already stop sterilization when baby >6mths.
I think you can easily buy baby stuffs such as baby food or diapers in Canada, try to communicate with your friend if anything can be bought there.
Also remind your friend to borrow carseat for your baby.
我將這事告訴你們,是叫你們在我裡面有平安.在世上你們有苦難,但你們可以放心,我已經勝了世界. (約16:33)Born 3.02kg/1m 4.52kg/2m 6.06kg/3m10d 7.19kg/4m25d 8.38kg/6m 8.79kg/7m 9kg/8m 9.6kg/10m3w 10.2kg/12m 10.2kg/13m 10.8kg/16m 11.2kg