When my DD was born, the lactation consultant and newborn nurse both told me to wait until 5-6 weeks to introduce the bottle nipple for fear of nipple confusion and once BF was well established so that I could skip a feeding without messing up the whole supply/demand thing. I don't know if nipple confusion is an urban myth, if it happens a lot or a little, I don't know, but I waited a month before introducing the bottle and the pacifier, and we had no troubles.
Also Emma's right: there are lots of ways of doing these things, and cup drinking is becoming more common for LOs.