Use of straw bottle for 14 month old

Hello Prithika I started when my baby was 10 months old. Hope your baby already is used to feeding bottle. Then it might be slightly easier I think. I first demonstrated by keeping the straw close to my mouth and doing that sucking action. Then I gave it to my daughter and she tried. For the initial few days it is just few ml that they take in. But gradually they will get used to it and drink 100-150 ml per day. I used the Avent stage 1 straw cup with the handle which will be easy for kids to hold and drink. Once they have can drink easily you can move to Stage 2 without the handle and bigger one.