Giá đỡ ly cho kayak Old Town (Cup holder insert)

Cup holder mainly for the Old Town kayaks.  The built-in cup holder is way too big and your drink holder falls out easily.  If you have a insulated drink holder this should fit perfectly. This has a 3 1/4" ID, so best check your drink holder first for fit. I used RTV to  hold it in. Note: RTV will not "glue" it in, as Polyethylene does not stick to RTV, but RTV will hold it well for quite a while.  If you want to make it permanent then you can get the special glue at Home Depot.