The bottle is the same, for puppies and kittens. I will write about my experience with kittens.

The packaging contained a 50ml bottle (filled up to the brim with 60ml), a cleaning brush, instructions (I think frequent feedings are needed for newborn kittens, the rest is okay), and 2 nipples, of which only the thin one is suitable for kittens (the other thicker one is for puppies).

The brush makes cleaning easy.

The plastic of the bottle is durable to heat in a cup of freshly boiled water.

Attention: When cutting the nipple, make small X-shaped incisions with scissors or a traditional razor, do not simply cut the tip of the nipple with a knife or scissors.

Test that the drops of milk drip slowly one by one through the bottle when you turn it upside down.

If it doesn't drip at all, open the incisions a little more so that the animal doesn't struggle and get underfed.

If it drips too much like a faucet, throw away the nipple and cut a new one, as the kitten will be at risk of choking or inhaling.

The orphaned kitten we found needed 2 nipples, as it tore the first one when its first teeth came out. We had to buy a whole second package, as we couldn't find just the nipples, they might be available in another online store. It quickly chewed on the second nipple as well. I don't know how many nipples will be needed for multiple kittens.

In general, this specific nipple requires a lot of attention for newborn kittens, as the size is borderline for their mouths. Also, the rubber material is not the best, not because the kitten eventually chewed on it, but because the small rubber "handle" at the base of the nipple, which makes it easy to insert and remove, disintegrated in just 3 days.

If there is no option with a thinner nipple, this product works for kittens, always with caution.