Peach teats simulate natural feeding because milk is squirted into the calf's mouth, just like real milk let down. The world patented flap valve inside forces milk out the end of the teat, instead of back into the feeder. This is ideal for sick calves that have difficulty sucking milk through conventional teats. The transverse slits on the end of the teat are positioned to minimise milk loss when the teat is not in use. Screw-in peach teats can also be fixed to calf feeders that use tubing feeding.