The main difference between a tabletop ashtray and a portable ashtray is the size. Tabletop ashtrays are typically larger than their portable counterparts and designed to sit on tables or countertops. Portable ashtrays, on the other hand, are smaller in size and designed for easy carrying. Tabletop ashtrays often have more features than portable ones, such as lids to contain smoke and odors, removable bowls for easy cleaning, multiple compartments for sorting different types of cigars, and built-in ventilation systems. Portable ashtrays usually feature only one compartment with no additional features. In addition to size differences, tabletop ashtrays tend to be heavier due to their construction materials while portable ones can be lightweight due to plastic construction materials or even aluminum casing options. Tabletop models require more maintenance since they must be cleaned frequently whereas a portable model can simply be emptied when full.