The Pritchard teat is the closest in shape, size and texture to a real teat and so is preferred by orphan lambs and kids.
Can be used with a soda bottle (28mm thread).
The teat has a cone tip: cut it closer to the end for initial feeding and for faster more vigorous drinkers it can be cut lower to provide a faster flow.
The end can also be carefully sliced at the end with a razor blade which allows the teat to snap back together and so be used in a partially inverted position.
A ball valve allows air into the bottle.
Wash in warm water only: do not put in dishwasher, boiling water or microwave.