Gradated clear water bottles?

[valarie51899]

Looking for links to some of those big clear water bottles with the time measurement marks on them for my 65-year-old dad, who’s terrible about remembering to stay hydrated.

I’m looking for more plain “masculine” styles; most of the bottles I’ve seen are really girly-looking or have silly motivational phrases on them.

 

[neostarwcc]

@valarie51899 https://www.elitefts.com/nalgene-2-l-bottle.html

Or any other size Nalgene if 2L is too big

 

[bjjwa]

@valarie51899 Oh I need this. O.O too bad I already have water bottles. Sometimes I'm like uh did I drink enough water.