Designs of a verified custom labware - an open sourced lab equipement - Sample Rotator mixer that can be 3D printed and assembled by following simple steps. 

This is the version 1 of this equipment that has a 9V battery onboard and mixes laboratory samples at any angle as per the user requirement.

The equipment can be printed and completely assembled in about USD 27 and hence saves a huge amount of money as compared to the commercial equivalents in market.