follow up

It turns out my local hardware does sell "Neverkink" brand "boat & camper" hoses that are "drinking water safe". As expected it's white with a blue stripe down the side. The hose also claims to guard itself against tangling or kinking or attracting mold and mildew. Guaranteed for life and made in the USA (can you imagine?), this hose appears to be of high quality.

The only down side: the smallest size available was 25 feet. But since in the end the non-toxic issue outweighs the length issue, I went ahead and bought the thing. It's not the size, but the chemical composition that counts.