Boxes and bags for freezing or cooling samples are offered at Avantor. Polypropylene, high density polyethylene, and cardboard boxes are available for the cooling and freezing of tubes, microtubes, cryo-vials, and conical centrifuge tubes. Choose gridded lids or lids with an alpha-numeric index for identifying samples. Purchase boxes in cases, packs, or individually. Benchtop coolers offer cooling and freezing without electricity or batteries; cooling blocks keep tubed samples at precise temperatures. For temperature stable transport, choose insulated bags with carrying straps.