So I'm switching my girl to a sippy,the kind with the bottle nipple feel not the hard plastic. And I told my mom this…

So I'm switching my girl to a sippy,the kind with the bottle nipple feel not the hard plastic. And I told my mom this when I dropped baby girl off at her house. Her response "she's too young!" All whining like she didn't want her growing up lol. I don't think she's too young. She already feeds herself (after spilling most of it lol) so why not try a sippy even if it's a bit messy too. I dunno am I rushing things mamas?