After my newborn son had trouble with regular Evenflo bottles, we purchased a Playtex Ventaire because of the wide nipple.  He liked it and did well, so we made the investment and purchased several more of the 9 oz size, thinking they'd last until he no longer eats from a bottle.  Unfortunately, the numbers are starting to wear off the sides after only a few weeks of use.  I place them in the dishwasher every day.  Soon I will be unable to determine how much liquid is in the bottle and will be forced to buy MORE bottles!  Another con is leakage.  Before filling, you must make sure the bottle...