Best transition sippy cup?

Good transition sippy cups? My 14 month old has refused every cup so far and is still drinking strictly from a dr browns bottle.

We just went straight to a straw

Tupperware - the sippy cups
Don’t spill
. I can
Send my link
If you desire

It’s going to sound silly but try giving them your cup with straw. Go to the cup aisle and let them pick one out. Also, what are you putting in the cup? My kids drink propel water.