bowling ball plug stands

My son started working for a Bowling Pro Shop and they had bottles sitting around. He asked me if I could design something for them to store them neatly. So I came up with this. I did add logos for the brands of bottles so they know which brand was in each stand. These bottles are for plugging the bowling balls. The one brand I didn't have the right color for the Turbo brand so I just used orange for it. The bottles are different sizes if I remember correctly. There are also small holes to be screwed down onto the shelf to not knock it over. Not sure if these will be helpful to anyone else. I also added layers to help prevent any leaks from getting through (I hope at least) and a dip under the bottles.