An ideal basic packer would be made of a body safe material, either medical or food grade silicone. It would be available in both circumcised and uncircumcised looks, have 3D testicles of reasonable size, and come in a range of shaft sizes. It would have as close to the firmness as possible as a flaccid cis penis. It would also come in a natural range of colors. Since we're talking ideals, an ideal one would also cost less than $70 for a basic, non-play packer.
I just wish we had a good silicone packer that didn't cost $90 and up for a basic packer with 3D testicles.