Turtleneck hot water sack / Hot water bottle

Scalding while filling is the most common problem users encounter when using hot water bottles. This hot water bottle has a flappable spout, which resembles a turtleneck sweater, and this where the inspiration comes from. It acts as a funnel when the spout is erect making it very safe and easy to fill up. The texture of the surface also resembles a sweater in addition to being attractive to touch and anti-slip.