Valterra and make a "taste free" potable water hose. There's a number of potable water hoses available that have an inert plastic that won't impart a bad taste to the water and that also meet NSF & ANSI requirements. I believe the taste free ones all have a blue tracer line along them to identify them. Have also seen them sold as commercial food grade hoses.
Note: The taste free hoses tend to be stiffer and need to be coiled with a larger radius. We have one that has a permanent kink in one spot because I tried to coil it like our old standard hose. Can't get rid of the stupid kink now. Annoying!