(These tips work for metal bottles too ... and outside of the cap thoroughly. Keep and replace any rubber gaskets or o-rings, but you can toss paper ones out. Glass doesn’t absorb odors ...

The flask-like bottle has a metal clamp and swing top, similar to glass containers made by Italian ... the bottle under hot water after the cap is sealed and wiping away any residue left behind.

A major reason this bottle outperformed all the other glass options is that it’s the only one we found with a metal-lined cap rather than some form of plastic. The simple utility of a finger ...