Playtex is the one with a "v" shape, right?, is that really 排氣好? But where can you buy the "steam equipment"? I have asked Jusco before who told me that this brand doesn't have the "steam equipment"
Avxxt is good for mixed feeding (breast + bottle). Their design is said to replica mommy's breast. Hence, avoid nipple confusion.
I also tried Dr. Broxx when my baby was 1-2 months. At that time, he cried a lot at night and so I suspect he suffered from colic. The sales told me that Dr. Broxx designed this bottle since his own son also got the same problem. I found it expensive, but thought that if it worked, it would worth a billion. It happend that my baby cried less after using the new bottle.
When he grew older, I switched back to Avxxt since there is a straw-like accessory to be put inside Dr. Brxxn's bottle and it was quite fuzzy to wash that part. I also fancied the colorful prints of Nxk bottoles and has bought one for my baby. However, he got confused again with the different nipple design. So until now when he is one year old, he only accept Avxxt or similar shape teats.