... ,Stirrer Hotplate,Melting Point Device,SamplerConcentration,Block Heater,Vortex Mixer,Cold Keeper,Mixer Incubator, Rocker, Shaker, Roller Mixer, PCR ... Economic Device To Replace The Ice Bucket.Simply plug it in, turn it on, and put the sample in, the Cold Keeper can keep ... simply change format of the compartments when you need different sizes. The unit can also use the ceramic-coated aluminum beads ...