JBeltMann,
1st... WELCOME TO REEF FRONTIERS!!!!
Unfortunately, I don't have the dimensions of that Oceanic Container...but in your case I don't think that really matters.
ANY plastic container will work for this type dripper. You simply pick one that will fit in your stand (milk jug, OJ container...it doesn't matter), then you clean it out, do the tubes in the lid...mix your calk, and start your drip. For that matter, if you have a space along side your stand where you can set a jug... and long enough tubing to run from the jug into the stand to your sump... that works also.
Of course, the larger the container, the longer it will drip at a given drip rate... and the more evaporation it will replace.
This DIY is very easy, as long as you have the space to place the drip container above where you want it to drip into...and didn't have the added problem of developing any leaks due to installation of a tube out of the bottom of the jug.
Good luck, and let me know how things work out for you!!!