โอดะบอกไว้ในSBSตอนมีคนถามว่าหมวกฟางอาบน้ำไหมว่าอะไรก็ตามที่เป็นน้ำส่งผลต่อคนกินผลปีศาจหมด(ยกเว้นฝนกับน้ำฝักบัว) แต่จะไม่มีอาการถ้าร่างกายเกินครึ่งอยู่พ้นน้ำ
First of all, let's discuss the problem of Devil Fruit users bathing themselves. People who have eaten a Devil Fruit are "hated" by the sea, and cannot swim. The "sea" here can refer to anything from rivers, pools and baths to any kind of standing water. On a worldwide level, they are all the "sea." When these people enter the water, not only can they not use their powers, they have trouble moving their bodies at all. They might be able to struggle a bit, but it wouldn't do much good. That's if their entire bodies are submerged in the "sea." With less than half the body or just the limbs, it gets easier. Also, rain and dripping water have no effect at all. Therefore, hip baths or showers are the most common choice.