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<p>Consumption of polyethylene terephthalate (PET) bottled beverages generates huge quantities of packaging waste annually. This study investigates opportunities for reducing beverage packaging waste in Sri Lanka. Primary data were collected measuring PET bottle, cap and hoop weights across various volumes and brands to calculate packaging efficiency and estimate annual plastic waste generation. Market data were derived from industry reports, manufacturer websites, retailer observations and literature. Results show smaller PET bottles (≤ 500 mL) exhibit significantly lower material efficiency, with bottle caps contributing up to 12% of total package weight. Despite this, caps receive less attention in recycling. Annual plastic waste generation from bottled water and carbonated soft drinks industry was estimated to be 57,000 MT in Sri Lanka. Sri Lankan bottled water industry market share distribution underrepresents medium packaging sizes, which exhibit highest packaging efficiency. Scenario analysis revealed that balanced market share distribution could reduce plastic waste generation by 7% compared to current condition in bottled water industry. The study highlights potential for reducing packaging waste through strategic modification of packaging size market shares. However, optimization efforts are constrained by limited access to detailed market share data from manufacturers and inadequate publicly available data sources.</p>

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Packaging efficiency and opportunities for plastic waste reduction in PET-bottled beverage industry: evidence from the Sri Lankan market

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Champika Ellawala Kankanamge,
  • T.W.M. Tharaka Madhuwantha Bandara

摘要

Consumption of polyethylene terephthalate (PET) bottled beverages generates huge quantities of packaging waste annually. This study investigates opportunities for reducing beverage packaging waste in Sri Lanka. Primary data were collected measuring PET bottle, cap and hoop weights across various volumes and brands to calculate packaging efficiency and estimate annual plastic waste generation. Market data were derived from industry reports, manufacturer websites, retailer observations and literature. Results show smaller PET bottles (≤ 500 mL) exhibit significantly lower material efficiency, with bottle caps contributing up to 12% of total package weight. Despite this, caps receive less attention in recycling. Annual plastic waste generation from bottled water and carbonated soft drinks industry was estimated to be 57,000 MT in Sri Lanka. Sri Lankan bottled water industry market share distribution underrepresents medium packaging sizes, which exhibit highest packaging efficiency. Scenario analysis revealed that balanced market share distribution could reduce plastic waste generation by 7% compared to current condition in bottled water industry. The study highlights potential for reducing packaging waste through strategic modification of packaging size market shares. However, optimization efforts are constrained by limited access to detailed market share data from manufacturers and inadequate publicly available data sources.