Tobacco Heated Products (THPs) are quickly growing as part of the tobacco market. These products fall into the Heat not Burn category, which requires some differences in the filters utilized. THPs do not require much actual filtration, since the tobacco is not combusted like in a traditional cigarette. The filters are mainly present to help cool the vapour before it reaches the consumer's mouth. With this different requirement, many producers are looking for low pressure drop options, such as hollow acetate tubes. With this being said, Innovation is not limited in this sector, with many customers exploring options with flavors, capsules, shapes, alternate filtering media, and many others.