Mine didn't get it the first few times then finally did and now drinks from it all the time, takes some practice
I found mine got it after a few goes, important thing is to leave it out for them to keep trying. They also copy you a lot at the moment so I’d try drinking it yourself - mine got it cause I’m always drinking out of a straw water bottle so he want to have it too
I did the yoghurt trick with my son and he got it after a few bites ☺️, he still bites the paper straws while he drinks.
I got my baby used to sucking the yoghurt pouches and then introduced a straw cup or putting a bit of yoghurt inside the straw and around the top helps ☺️
https://www.tumtumtots.com/blogs/news/how-to-teach-straw-drinking We used method 2 and she got it straightaway 😊