Polycarbonate Mini Coolers safeguard various solutions such as enzymes, DNA, RNA, and cell suspensions by preserving freezer temperatures on lab benches. Crafted from sturdy polycarbonate filled with non-toxic gel, these coolers accommodate twelve microtubes ranging from 0.5 mL to 2.0 mL. When pre-frozen, they sustain the specified temperature for about an hour (45 minutes for the -70°C model).