I don't think acrylic solvent cement will work on tupperware, but you can try it with a piece of scrap acrylic and see if it will stick to a tupperware. It may work, but I just don't remember that it does.
If it does not, you may still use it but with a mechanical seal. Use bulkhead and drill holes on the container and the tank, and use a extra rubber washer between the tupperware and the inside of the tank around the bulkhead, and it should be good to go. There will be a space between the tupper ware and tank due to the washer, but you can use silicone glue to seal it up if you don't want thing to get trap in there.