The following drop-in centers provide counseling on the effects of drug use, safe drug use, harm reduction equipment such as needles, syringes, distilled water, cotton, and referral services for health services and drug treatment, as well as counseling and harm reduction services for drug use through injection. Volunteers at all centers are drug users and work proactively in almost every district in Bangkok, Pathum Thani, and Nonthaburi, creating a friendly atmosphere and a true understanding of drug users.