Getting baby and toddler to drink water!!

Hi there
Hoping i can gather some suggestions.

I really want my 5 month old to be able to drink cool boiled water but she screws her face up and doesn't take any. I have it in the same bottle as the milk i give her, but with a different teat.

The reason i am so paranoid and anxious about her taking water is that with 1st daughter we never really offered water much, she just drank her milk, and we now have a terrible constipation issue with her. After a lot of trying with foods added (prunes, kiwi, bran, watermellon) and eliminated (bananas, stodgy foods), homoepathic treatment etc, we are now on Dufulac for her. But i truely reckon her problem stems from not enough fluid.
We are now enforcing water and diluted juice drinking -30 ml/ 40 ml before she has anything to eat. We offer it constantly but she pushes it away or takes the tiniest sip and says no more. It's like getting blood out of a stone though.
And i really do not want 2nd daughter to end up with same issues.

Can anyone suggest ways to get the water down for both girls at their different stages. Am i right to expect a 5 month old to be able to drink water.

Any comments/ suggestions are much welcomed.

Thanks

We used a sippy cup or a normal cup for water to start with, the novelty factor and they aren't expecting milk helps.
Now she is a little older we just use the mini pump bottles, perfect amount for her to drink, and easy to suck, we just offer it when she looks/acts thirsty/grumpy/grizzly.

My daughter is in the same boat. 6months old and screws up her face and hits the bottle away. been suggested we try using the different cups available (very expensive to buy them all, but I brought a few) and have found the only one she would take was a pump bottle. 2 of the sipper cups I brought I even had trouble getting anything out of without sucking extremly hard- new baby from the warehouse and Nubby soft spout. the Nubby one they use like a bottle by massaging the teat but hardly anything comes out so its a effort for them.

My DD didnt really start drinking till about 7 months old, I just gave her my pump bottle and she soon worked out how to suck the water out. I brought one nuby cup from the supermarket, it has a handle on either side and a bit that sticks out that they can suck on. I just have it sitting down on the floor with her, and after food I always offer it. I would do the same for your older daughter, try not to make a big fuss, maybe let her pick her own bottle/cup, and offer it after food, and frequently through the day. good luck

the sippy cups I got are spill proof and hard to suck water from.I did get a exceptionally cheap one from New World ($2.60) but she didnt take to that either but it wasnt spill proof. My daughter is bottle fed aswell and have started solids, so much to my frustration she still wont have much water