Buffalo Dental Sanitrap4 trap-eze SS odor control trap refill, 5 gallon. Buffalo Dental Sanitrap4 trap-eze SS odor control trap refill, 5 gallon. Original classic trap-eze upgraded to include an automatic sanitizing system to keep it smelling fresh and clean.. new patent-pending sanitizing system inside the trap designed to last for months. Fully automatic dispensing helps assure steady action and long term freshness. Unique system covers the sanitizing agent and activates after the trap is in use..... new patent-pending sanitizing system inside the trap designed to last for months. Fully automatic dispensing helps assure steady action and long term freshness. Unique system covers the sanitizing agent and activates after the trap is in use....