I worried about smaller bottles falling through the rack so I placed a strip of "Cosmos ® 2 Inches Wide 10 Yards Black Nylon Heavy Webbing Strap with Cosmos Fastening Strap" 1 inch from the back of each shelve as a safety measure. Holds 2 Large Trek hardtails very firmly. Fantastic sound stage. There also isnt a cover for the charging port but that really isnt a problem for me Ive used these earbuds since 2015 and I absolutely love them. It has a very small footprint for the amount of boots it holds. I was skeptical to get these bc they were so cheap, but they are super comfortable and not tight! Very sturdy and looks really nice. I was moving from Georgia to Ohio. Now besides it looking pretty--it worked beautifully--noise cancelling was very on point and it was super comfy to wear---nice comfy padding on the ears--and nice padding on the top of the head.