Scepter 3-Pack Portable Military Style Water Container for Camping & Outdoors, 5 Gallon, Green - Heavy-Duty Plastic Beverage and Hydration Dispenser for Outdoor Trip

Be aware that cheap plastic gallon water jugs will eventually break down and leak, especially if exposed to light and/or heat. They don’t keep forever, so if you’re not rotating through them, get something sturdier. Make sure it won’t host any microbes, and refresh it every 6 months or so. This is one option: https://www.amazon.com/dp/B07JZSTL47?ref=ppx_pop_mob_ap_share