The only way to know for sure if you can use these pouches (or any other keto friendly product) and stay in ketosis is to monitor your ketone levels before and after using a pouch while being in ketosis
It can be absorbed by inhalation, touch or ingestion
Nakonezny PA, Carmody TJ, Morris DW, Kurian BT, Trivedi MH

Direct Bans 7 out of 7 direct bans implemented National TV and radio International TV and radio Local magazines and newspapers International magazines and newspapers Billboard and outdoor advertising Advertising at point of sale Advertising on internet Ad Ban Compliance: 100% Indirect Bans 8 out of 10 indirect bans implemented Free distribution in mail or through other means Promotional discounts Non-tobacco products identified with tobacco brand names Brand name of non-tobacco products used for tobacco product Appearance in TV and/or films: tobacco brands (product placement) Appearance in TV and/or films: tobacco products Prescribed anti-tobacco ads required for any visual entertainment media product that depicts tobacco products, use or images Complete ban on sponsorship Any form of contribution (financial or other support) to any event, activity or individual Ban on the publicity of financial or other sponsorship or support by the tobacco industry of events, activities, individuals Ad Ban Compliance: 100% Source: GTCR Citation: Drope J, Hamill S, editors

Nicotine & Tobacco Research, 2015
What Is Mouth Alcohol