breastfeeding breast milk from breast and bottle

So I'm a FTM and just full of questions I still have like 12 weeks till my little guy is due but I'm wondering i plan on breastfeeding and I'm curious if I feed him from my breast at home but feed him breast milk out of the bottle when I'm out and about with him like does that work will he accept both or will I run into problems and will I have to do just one or the other? I know might be stupid question but like I said FTM