It's very easy to pick up a stainless-steel bottle if you're traveling and you've forgotten to bring your stainless-steel bottle and fill that up with water or filtered water, versus purchasing plastic bottled water.
旅行の際に飲料水補充用の ステンレスボトル持参を忘れてしまっても ペットボトル詰めの飲料水購入ではなく ステンレスやビン詰めの飲料水を