FluidX™ 2D Barcoded 1mL Cryo Tubes with Internal Thread. Azenta Life Sciences. The FluidX 2D Barcoded 1.0ml Cryo Tube Non-Jacket with Internal Thread is ideal for cryogenic sample strorage in gas phase liquid nitrogen, It features a 2D Barcode on the tube base, stackable in an SBS format rack and is automation friendly.