A thicker layer height helps it grip the bottle better, however a lower layer height feels smoother, I guess it is a matter of personal preference and time your have. On .3 mm it can be printed in just over an hour.
So I designed this first mockup using inventor since that's what I'm learning in high school. I've made most of it parametricly relying heavily off the dimension of the pill bottle, hopefully I can learn openscad in time to try making a customizer version.
In the second mockup I changed to a handle design based off of feedback that some disabled people may not be able to grasp their hand all the way, however it would be possible for them to still use a lever. Another small experimental feature I added was a second ring inside for tackling smaller pill bottle caps.
for mockup 3 all I did was change that dimension from 1.5 to 1.475
This was designed using a series of extrusions in inventor, then filleting them for more grip. After getting feedback from Venture Cafe, where someone with a broken had tried to use it, I decided that the lever is a must. It allows people to place their bottle on the opener, then well open it with just one working hand. (will add more about this later)
Displayed the Product at Venture Cafe
So Yesterday (10/23/15) I showed the medication bottle opener off at the venture cafe to get some user feedback, and I'm shocked that I had no negative feedback! There were several sales reps who now want to give my product to their clients (for Free!) to make life easier on them. Decided I should probably get back to the injection mold guys about getting one of those so this would cost less than $1 per unit. Thanks for inspiring me to create this product, hope it helps a lot of people.
Now with a no handle option
There is a no handle option for the uncapper mockup 2 now.
As a small note, after the competition I'll make the license more open, just would prefer no remakes before then.
One thing if you do not have to worry about having non 'child proof' lids is to just ask your pharmacist for easy open pill bottles, most carriers have some form of arthritis friendly containers.