Toothbrush sterilizers are said to reduce disease-causing microorganisms that linger on your toothbrush and lead to dental and systemic diseases. Most sterilizer products utilize UV and/or ozone technology to eradicate up to 99% of germs in about 10 minutes. While some units are large and meant to rest on a bathroom counter, others are compact and portable for travel. Larger products are usually plugged in, while smaller, portable units require battery power. Certain sterilization products also double as a storage space after each use to prevent cross contamination from other loose brushes.