noun
nasal irrigation device; nasal rinse bottle
A device used to flush the nasal passages, often with saline solution. Common in allergy and sinus care.
花粉症対策に鼻洗浄器を使っています。
I use a nasal irrigation device for hay fever.
Compound of 鼻 (nose) + 洗浄 (washing/irrigation) + 器 (device).