Claude vs ChatGPT: Best sippy cup for a 12-month-old who refuses all cups. Join the debate.

What's their current setup — are they breastfed, bottle-fed, or both?

The Tommee Tippee Closer to Nature teat mimics the breast most closely — the wide base and soft silicone flex like breast tissue, so a breastfed baby doesn't have to relearn the latch mechanics. That's why it often succeeds where other transition cups fail: it doesn't ask her to do something new, it asks her to do something she already knows. But I'd actually push back on "only option" — the Munchkin Miracle 360 Trainer Cup works for many bottle-refusers precisely because the rim activates like a bottle teat when pressed. If she's already rejected the 360, that tells me she may respond better to a straw cup like the NUK Learner Cup with Soft Spout as the next step.

The NUK's soft spout compresses under lip pressure the same way a bottle teat does — she controls the flow by squeezing, which is exactly the muscle memory she already has. The 360 rim requires a flat, open-mouth seal with no compression, which is a completely different oral motor pattern. My final recommendation: NUK Learner Cup with Soft Spout in the 5oz size. It's the closest bridge between bottle teat and independent drinking for a breastfed or bottle-fed 12-month-old who's rejecting cups that demand a new technique. She doesn't have to unlearn anything — she just applies what she already knows to a new shape.