First of all, congratulations to you for breastfeeding at one year. :-) Btw, my 1st never took a pumped bottle either. The WHO (World Health Organization) recommends breastfeeding till 2 years of age since the kids still get nutrition, immunity and emotional benefits. So, go with it, Mama!
The milk thing is a bit of a marketing myth... started in the 1950's by the dairy lobby. Cow's milk isn't the end all be all of child nutrition - breastfeeding is. As long as your daughter is eating yogurt, cheese, sour cream, or veggies with calcium, then she's likely getting enough.
Adding milk is no different then adding any other food to her diet. Put it in a sippy (skip the valve if she's not used to a sippy) and offer it at meal times. If she drinks it great, if not don't worry. Remember it can take 12-14 times of trying a new food before many kids decide it's OK to consume. Whole milk is recommended by the AAP till age 2, and then 2% milk thereafter. The little ones need the extra fats, since fats support brain development.
Hope that helps! All my best,
-D.
http://www.shininglightprenatal.com/