Switching to Sippies

Any advice on switching from bottles to sippies? My sone is a year and a half and still prefers his bottle. He’ll sometimes drink from a straw. I’ve tried almost every type of sippie and it seems like he just hates the different texture or knows it’s not his bottle and throws it down. People have suggested taking away all his bottles and only offering sippies and when he gets thirsty enough, he’ll have to drink. Not my son. If he really doesn’t like the sippie, he will not drink and I don’t want him to get dehydrated. Any tips?