Better make sure your garden hose is made for potable water too then:
Camco (22783) 25 Ft TastePURE Drinking Water Hose - Lead and BPA Free, Reinforced for Maximum Kink Resistance 5/8"Inner Diameter , White https://www.amazon.com/dp/B004ME11FS/
And here’s some food-safe resin so you can coat any outdoor surfaces that might have contaminants.
Epoxy Resin Crystal Clear, Food Safe Resin for Craft, Bar Table Top, Wood, Art, Jewelry, Super Gloss Resin for Casting, Coating, Non Toxic Resin 1:1 Ratio- 16 oz Kit https://www.amazon.com/dp/B07Y3G5P6C/
Let me know and I can provide information about which types of metallic foil make the most edible hats.
Get a drinking water hose. Makes brewing outdoors a lot more convenient.