ayeung,
I started to use "Dr. Brown" bottles since my bb is 3 months. It can help her more easy to burp and it cost around $65 - $70 each. You can buy one bottle first and try if you are satisfy with it. As I remeber pampers club member card holder can have 10% disc from "BeBe dreams", pls check!
Dr. Brown is available in Jusco, but I quess they are not on sale now.
If your bb is still first few month old, vomit is really easy to happen. Some Bk mami said it is because their stomach is still too small , and it can be improve when they become bigger. Don't worry!
My nurse teach me the below and hope it can help U :
1) Change their diaper before feeding.
2) Hold their position and don't let them lay down immediately even they burp already, if possible - 30 mins.
3) burp the bb every 50ml you feed.