
you do need to seal the bottle, I use silicone sealant but I believe you can use superglue to both seal the teat and stop the bottle being opened again. For the formula I use half white fabric condition with a dash of yellow conditioner & half boiled water.
For the dummy it depends on if the baby already has a magnet fitted or an open mouth, if it has a magnet fitted you need to cut the whole teat off and glue a small magnet to where the teat should be but don't do this until you have your reborn as the magnet needs to be the right way round and the only way of finding out which way is to put it to your reborns face, I would sit a piece of cloth over her lips before putting the magnet on so you don't scratch her paint/varnish. If it is open mouthed cut half the teat of then (depending on how open the mouth is) fill the open end of the teat with either super glue or silicone sealant or glue the cut off end over the top of the stubby bit left so it has a mini teat. HTH.