Probably because it was designed primarily to carry golf clubs.

Agree with my right honorable friend, Barry. The Cart 14/15 bags are equipped with that feature and I use it to store my balls. I use a Yeti 36oz water bottle, to carry ice water in. In our high temps and humidity, safest drink. Do start my round out with a 20oz Powerade. Do ride cart due to health issues. Have a mid size tour bag, that I use at special events locally and TT events I drive to.

I can’t make up my mind between the mid-size tour bag or the premium stand bag. Ultimately I’d like to have both as I will alternate between walking and riding (summers are just too hot in South), but can’t figure out which one I want first.