Weaning from the bottle - now?

Okay - kids are 18 months now and I'm ready to wean them from the bottle. Well, I'm not really ready, but they're starting a part-time daycare next week because I started a new job and my nanny can only work till 3 most days.... Anyway, the daycare doesn't allow bottles in the 18-month room. I think it's great, but that means my kids have to get weaned.

How to do it?

They take 4-5 bottles per day right now. I know it's a lot, but I don't know how to break it.

I've tried milk in sippy cups and that is rejected.

Here's their bottle schedule:

6am wake up bottle

7-7:30 breakfast (which my daughter refuses most times)

9:30 bottle before nap

snack at noon

lunch at 1:30-2'ish

3pm bottle

5pm dinner

6:30 bottle after bath

7:30/8pm bottle before bed

Please give me some advice? thanks

Pictures

I still don't have Christmas photos yet, but wanted to share a couple of pics from the kids' music/gymnastics class. When I look at my kids, I can't believe how blessed I am.