CoolCell LX, purple
There is no pre-cooling, use off the shelf, not cold to the touch when frozen. No stuck lids, easy to open and re-use after five minute thaw period. CoolCells are easily cleaned with aqueous detergents, alcohol, bleach, or acid/base viricides
Good choice for the environment since you eliminate the need for isopropanol otherwise used in this application.
Instruction manual is found under the tab "documentation"