For those who have exclusively breastfed babies - do you bring bottles for any reason, or your pump, when you are traveling?

I'm taking a 5 hour flight tomorrow with my 9.5 month old to visit family for a week. I only use bottles for her when I"m at work. If you normally always breastfeed your baby, is there is any reason to take bottles of pumped milk with you on the flight/trip?