Sample containers for laboratory sample preparation; laboratory equipment, namely, pipette washers and dryers; scientific instruments, namely, presses, extractors, mills, mixers and grinders, and combinations thereof specially adapted for laboratory use, namely, solid sample size reduction, sample homogenization, cell dna lysing and extraction, sample mixing, sample preparation for xrf analysis, sample preparation for pesticide analysis, mechano-chemistry, and mechanical alloying; Scientific and laboratory apparatus, namely, presses, extractors, mills, mixers and grinders specially adapted for laboratory use, namely, for processing samples in preparation for analysis; Sample preparation equipment specially adapted for laboratory use scientific and laboratory purposes, namely, mills, extractors, mixers, and grinders, and combinations thereof; scientific instruments, namely, cryogenic mixers, mills and grinders specially adapted for laboratory use scientific and laboratory use; laboratory and scientific equipment, namely, a dissolution instrument comprising a crucible and programmable controller for preparing samples for analysis of their metallic composition; laboratory equipment, namely, a fusion flux instrument comprising a programmable controller, crucible, and furnace for analyzing the metallic and chemical composition of materials; Scientific instruments, namely, laboratory grinder and extractor accessories specially adapted for laboratory use, namely, sample vials, vial clamps, vial closures, cooling stations, chilled cutting boards, chilled sample holders and chilling vials; grinding media and grinding media kits specially adapted for laboratory use, comprised of beads, balls, impactors, ceramic homogenizers, vials, titer plates, jars, and grinding dishes for ambient and cryogenic scientific and laboratory mixers, mills and grinders; Polymeric films specially adapted for laboratory use in connection with liquid and solid samples for laboratory analysis; combination of polymeric snap-rings and collars specially adapted for laboratory use in connection with liquid and solid samples for laboratory analysis; Scientific instruments in the nature of accessories for laboratory grinders, namely, manually and electronically powered vial extractor and vial opener; Manually and automatically controlled hydraulic scientific and laboratory presses specially adapted for laboratory use, namely, processing samples in preparation for analysis; Scientific instruments, namely, thin polymeric films specially adapted for laboratory use as cell windows for spectroscopic analysis