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| Cons |
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While the concept behind these bottles is excellent, the time it takes to clean, prepare, and warm up is awful, especially after several months!
If you prepare bottles ahead of time, you need to take the straw vent system OUT of the bottle BEFORE warming b/c if you don't, smelly condensation will leak all over the place, making the warmer a mess and you and your baby a mess as well!
And keeping track of the parts can be a pain too.