Yes, it should be safe to store it there. Or if your really worried when you pump next time just add it to your coffee.
I'd strongly suggest getting some freezer bags and store them in your pump bag. When I was pumping at work for my first I would find some days I'd pump more than others and needed extra bags, etc.
First - HOLY BUCKETS! I got 11 oz this morning after a 9 hr stretch and was elated. I usually don't get near that amoung per session when I pump. I am totally proud of my boobs and how much milk I make for my baby!!! I'd second that above post with retting storage bags. Do you have a supply in your freezer?
What I understand about the BPA is it leaks when heated. That's why they aren't suppose to go in the microwave or dishwasher.
Storing your breastmilk in your water bottle is ok. I always keep a few extra storage bags in my pump bag. I also pump a huge amount. I usually get around 10oz every 3 hours when I was pumping.
Thanks ladies! From now on I'm making sure that I have an extra bottle with me at work. I just wasn't expecting to ever produce more than 16 or 17 oz in 2 sittings! I only have a few bags in the freezer right now unfortunately, so I'm really happy my supply is going up so much after I rented a hospital grade pump. I had about 45 bags in the freezer over the summer, but then I had to be hospitalized 2x in a week, and was taking meds that I couldn't BF on, so ALL of it got used up. Until this past week, I've just been producing enough for him while I'm at work (about 12-14 oz) but hopefully now I'll be able to make enough to put some in the freezer for emergencies.