H2O4K9’s 25 oz stainless bottle with travel bowl is a long-running favorite for owners who want something tougher than soft plastic for cars, daypacks, and trail days.
Twenty-five ounces covers many dogs for a solid outing; large/hot-weather hikers should still pack a second bottle or a human reservoir share plan.
Stainless cleans easily and survives being tossed under a seat — a quiet quality-of-life win.