J.R.
I also recently went back to work after having a baby in June. I use a regular adult soft lunchbox to take my son's bottles to his daycare. It's a taller one that I found in Rite Aid for $5.99. It is big enough to hold 4 of the 9 oz. Avent bottles upright plus an ice pak. It fits nicely inside his diaper bag. You probably can find something similar just about anywhere especially at this time of year when lunch boxes are on sale because of the beginning of the school year.