Aww alam ko yan, struggle talaga pag choosy ang babies sa bottle shape! A few of us tried the Philips Avent Natural bottles kasi ang neck nila ay mas slim compared sa ibang brands, at surprisingly okay ang leak-proof seal nila kahit gaano kaangat haha. My cousin's baby also rejected wide necks pero nag-adjust kaagad sa Tommee Tippee Closer to Nature, which also has a narrower design, worth trying din siguro!