toddler cups

victoria • 24 • boy mom

my 16 month old uses munchin 360 cups & sippy cups for drinking- but he won’t drink his milk out of anything but the sippy cup. If we give him milk in the 360 cup or a travel cup with a straw, he takes one sip and that’s it. Not sure how to get him to drink milk out of a different cup besides sippy! i don’t want him to have any mouth issues because he simply won’t drink milk out of anything else