10. Solar-powered flashlights
9. Non-stick glue
8. Waterproof towel
7. Black highlighter pens
6. Double-sided playing cards
5. Inflatable dartboards
4. Silent alarm clock
3. Fireproof matches
2. Battery-powered battery charger
And No 1, Top 10 Failed Patterns
1. Two in one traffic/fload control 'smart' tunnel
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