I designed this adaptor so I could transfer the last bit out of pump bottles into the next one. I hate throwing away the product that the pumps won't reach. This one fits most bottles that have a approximately 25 mm neck which is common for products that come with a pump like lotion and hand sanitizer.
The included Fusion 360 CAD file is highly parameterized so you can adapt it to other sizes.
Prints without support in any material.
Re: https://avedictionary.com/shmoo-schmoo/
Update: v3 has grips that match my other transfer adaptor
The author marked this model as their own original creation.