@miche_nz I just made bottles as I went. I room share and in the room is a water cooler that dispenses boiling hot and ice cold water so we just used half and half and that was perfect. Scooped as we went. The nice thing about having it be a regular water cooler is it's used for our regular water needs. So, product for us that also benefits baby and will last long after baby is done with formula. We've had it since before she was born.
A lot of people will tell you to not get your baby used to warm formula because it makes it harder for them to take a cold bottle. To each their own there, I think that's baby dependent.
What I did really like was the Dr Brown's formula pitcher. Make the formula once a day and it keeps for 24h. Nice and smooth, no clumps. Really cheap, too, and makes up to 40oz so definitely enough for the youngest baby.