You are a genius my friend. Wonderful idea. I also like the velcro idea it is not for me because I no longer have boats....but I just might be experimenting with a tackle box top holder for my slab sauce. What if I use a hole saw and cut a circular hole in the top of the tackle box large enough to fit the diameter of the jar I will use. Insert the jar so that two inches is above the tackle box. Take aquarium sealant and seal around the outside and inside the tackle box around the jar. Let it set 15 hours to cure. This holds the jar in place securely. The next day put your slab sauce liquid into the jar and screw on the top. Take your tackle and your sauce and just go fishing. Works for me.