文档介绍：Choosing nipples and bottles for formula feeding
Ultimately your baby will decide which bottle you use. The first test is to see which nipple he'll
take most easily. Once you determine that, you can select the bottles and bottle accessories you
need.
Choosing the right nipples
You can choose latex, silicone, or rubber nipples. Latex nipples are softer and more flexible, but
they don't last as long. Silicone nipples are firmer and hold their shape longer.
You have a choice in nipple shape, too — traditional, orthodontic, or flat-topped nipples.
Orthodontic nipples, designed to modate your child's palate and gums, have a bulb that's flat
on the side that rests on your child's tongue. Flat-topped nipples emulate the shape of a mother's
breast.
Nipples are also available in a range of sizes and flow speeds. You may have to try a few sizes to
find one that works best for your child, but don't give an infant a nipple meant for a toddler.
Because you can't know beforehand which type or size nipple your child will prefer, it's best to
play it safe and buy one of several types. Once you've determined your child's preference, you can
purchase enough to last for months.
When to replace nipples
Formula should drip steadily out of a nipple. If it pours out in a stream, the hole is too big and the
nipple should be replaced. Check nipples periodically for signs of wear, such