We have been trying to get LO to drink from his Zoli for about a week now with no avail. He loves to mimic, so I have tried to show him how it works and he will put the straw in his mouth but won't suck. He likes to drink out of a cup the traditional way (if I hold it up to his mouth for him) so I tried a sippy cup but he won't drink from that either.

Should I just keep offering at every meal? Any tips on helping him learn to suck from it?