Ziploc Sandwich Bags vs Tupperware Sandwich Box

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Ziploc Sandwich Bags vs Tupperware Sandwich Box

  1. 1. Ziploc Sandwich Bags vs. Tupperware Sandwich Box Melissa Antokal, Luis Calderon, Sarah Mandlebaum, & George Mitchell April 14, 2010 1
  2. 2. Ziploc Sandwich Bags vs. Tupperware Sandwich Box Melissa Antokal, Luis Calderon, Sarah Mandlebaum, & George Mitchell April 14, 2010 1
  3. 3. Agenda Why Sandwiches? Functional Units Overview of Each Product Phase Data Score Card Conclusion & Recommendations 2
  4. 4. Why care about Sandwich Vehicles? According to a Wall Street Journal article, Americans are packing their lunches now more than ever. They do it to watch their wallets and their waistlines. But they are also creating less waste. This study’s objective is to determine which sandwich vehicle for the average American’s lunch is indeed saving money and reducing waste over a lifetime of working lunches. 3
  5. 5. Functional Units SANDWICH DAY Ziploc Bag Tupperware Box 1 bag 1 box 5 uses 6500 uses (260 uses/year x 25 4
  6. 6. Functional Units SANDWICH DAY Ziploc Bag Tupperware Box 1 bag 1 box 5 uses 6500 uses (260 uses/year x 25 4
  7. 7. Raw Material Use & Extraction Manufacturing Transport Reuse End of Life Input Energy for Transport Polycarbonate Closure Wrap Bag Petroleum Manufacture To store Bag Use Production Manufacture Assembly To home Output Recycled Cardboard Box Manufacture Production Ziploc® Plastic Sandwich Bag System Boundary 5
  8. 8. Raw Material Extraction Manufacturing Transport Use & Reuse End of Life Input Energy for propylene gas Polypropylene, Box Box To Store Manufacture Box use Landfill Polyethylene Assembly To Home Output Tupperware® Plastic Sandwich Box System Boundary 6
  9. 9. Raw Materials Ziploc baggies made from LLDPE 1 baggie weighs 2.35 g Cardboard is made from 100% recycled paper 7
  10. 10. Raw Materials Ziploc baggies made from LLDPE 1 baggie weighs 2.35 g Cardboard is made from 100% recycled paper 7
  11. 11. Raw Materials Ziploc baggies made from LLDPE 1 baggie weighs 2.35 g Cardboard is made from 100% recycled paper 7
  12. 12. Raw Materials Box lid made from 50 g LDPE Box bottom made from 75 g Polypropylene 8
  13. 13. Raw Materials Box lid made from 50 g LDPE Box bottom made from 75 g Polypropylene 8
  14. 14. Manufacturing Processes Plastic Bags – Blown Extrusion Plastic Containers – Injection Molding Assumption: Plastic production and product manufacture are co-located 9
  15. 15. Manufacturing Processes Plastic Bags – Blown Extrusion Plastic Containers – Injection Molding Assumption: Plastic production and product manufacture are co-located 9
  16. 16. Manufacturing Processes Plastic Bags – Blown Extrusion Plastic Containers – Injection Molding Assumption: Plastic production and product manufacture are co-located 9
  17. 17. Transportation 28t diesel trucks are full of product Transportation totals 500 miles 10
  18. 18. Transportation 28t diesel trucks are full of product Transportation totals 500 miles 10
  19. 19. Use Phase Dishwasher is full (box = 3%), 4.5 gallons/ wash, 300kwh/year Handwashing: 0.75 gal to wash a baggie, wash 4 times, then throw away Wash in dishwasher 2x/week, 2x by hand 0.5 gal to wash a box Gas hot water heater 11
  20. 20. End of Life Don’t recycle anything at end of life Throw away box after 25 years 12
  21. 21. End of Life Don’t recycle anything at end of life Throw away box after 25 years 12
  22. 22. Cost Analysis Box = $3.00 ($12.00 for 4-pack) Baggie = $0.07 ($8.91 for 125 ct box ) 13
  23. 23. Cost Analysis Box = $3.00 ($12.00 for 4-pack) Baggie = $0.07 ($8.91 for 125 ct box ) 13
  24. 24. Energy Usage Ziploc® Tupperware® Throw away - raw material Use phase is THE energy usage extraction dominates Wash – Use phase dominates So, what do these 14 numbers mean?
  25. 25. GHG Emissions Use phase dominates Green House Gas Emissions 15
  26. 26. Acidification/SMOG Formation Acidification Ziploc®- Manufacturing and Use Tupperware®- All use phase • Electrical generation dominates machine wash scenario 16
  27. 27. Acidification/SMOG Formation SMOG Formation Primarily driven by raw material extraction phase for Tupperware 17
  28. 28. Water Usage Ziploc® Tupperware® Manufacturing and Use Use only 18
  29. 29. The Score Card 19
  30. 30. Conclusion Consider what you DON’T see – Personal water use vs industrial water use Assumptions are very important! Hand-washing vs dishwashing • Energy efficiency • Energy source 20
  31. 31. Recommendations 21
  32. 32. Recommendations Buy the baggies, baby! 21
  33. 33. Recommendations Buy the baggies, baby! or 21
  34. 34. Recommendations Buy the baggies, baby! or Keep your containers for 50 years, and wash by hand with .069 gallons (1 cup) of COLD water per wash. 21

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