Dr. Brown's Baby Bottle~We've been buying these for quite a few yrs & I like that you can buy them in glass or the new bpa free.

It's also great that you can purchase these seperate or in money savings package.

Theres a plastic pipe that runs down the middle of the bottle~but easy to assemble with the other pieces it comes with~looks like a strange contraption at 1st, but worth it.

It comes with a special little brush designed to fit down the pipe & other pieces to clean out the formula that will build up unless you make sure to clean the pieces everytime.

Also, if you fill the bottle too full...