u/Ok_Definition_803

I have a 30oz sway and think it’s a great size. I do not have a 40oz but I find they’re heavy enough as is. I’m someone that can refill my bottles easily. I find the new 18 oz really cute, but I’m not sure if it’s a decent size for adults still or if it’s too small? It seemed like it was marketed as a kids size but I’m not sure, it could be good for.. other drinks besides water?