The Cryo-EM Puck Generation 2.0 is designed for organizing, tracking, and safely shipping samples on grids for single particle analysis and other Cryogenic Electron Microscopy (Cryo-EM) applications. Key features include 12 indexed well locations with easy-to-read numbering. Its clear, affixed lid rotates for grid box insertion and retains liquid nitrogen during transfers to protect samples. Strong magnets ensure puck retention in storage and shipping canes, yet allow for easy removal. Integrated 2D barcoding and custom puck serialization provide advanced sample tracking. A lid-lock feature ensures easy and secure loading. This puck accepts all round Cryo-EM grid storage boxes. It is compatible with TW34, TW35-6, TW35-10, HC34, HC35, VHC35 storage dewars, and CX100/CXR100 dryshippers, offering a robust solution for sample management. You have your choice of 10 unique colors for easy identification. Color choices are red, black, purple, grey, blue, gold, green, violet, brown or orange.