Prevention of Marine Litter in the Lakshadweep Sea (PROMISE) is a 4-year project (2020-2024) supported by the European Union (EU) under the SWITCH Asia Programme. Tourism industries have been identified as major contributors to marine litter due to high consumption rates of fast-moving consumer goods (FMCG) and convenience products wrapped in single-use plastic packaging. In many touristic regions of the global south, this is aggravated by the absence of effective policy frameworks, a lack of consumer awareness and insufficient capacities of local authorities to handle the increasing solid waste. The Maldives, Sri Lanka and India have undergone substantial growth in tourism clusters located along their shorelines of the Lakshadweep Sea. While this has increased the economic well-being of the local population, these developments have also come at a high price.