The bottle shape is designed for easy refilling of lotion.
The bottle has a moderate hardness that makes it easy to hold, and since it can be held with one hand, you can use your free hand to support the bottle and refill it without worrying about it falling over.
The shape of the nozzle fits perfectly into the mouth of the bottle. The shape of the nozzle fits perfectly into the mouth of the bottle, making it spill-proof and easy to refill to the end.