A Hydro Flask bottle—of any kind—is reliable. This insulated, double-walled stainless steel water bottle has a powder-coated exterior (a permanent, lightly textured coating) and a plastic cap.

But others are plastic, glass, or non-insulated steel ... mind when the liquid doesn’t stay cold all day). I’m a Hydro Flask devotee. I’ve owned my 24-ounce bottle for four years now ...

EASY TO FILL: These plastic bottles have wide mouth openings and have screw caps. They also come with a pour spout and a bottle funnel so you can easily fill each hidden flask with your favorite ...