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HOPCAP / Plastic bottle cap


The hopcap is for children who are not presented with enough opportunities to receive education.
These caps can be used for children to memorize simple words and learn about numbers and colors. Children can also have fun arranging and placing the caps on top of one another. Children can learn using these bottle caps, without the need for textbooks.
This cap can be applied to items that are supplied to poor countries as well as all PET bottles. This is an effective means of reusing and recycling plastic caps.
Children learn and thus develop dreams and hopes for the future.



Seoul, South Korea


Seoul National University of

Seoul National University of
Science and Technology
Seoul, South Korea

Jeong hwan Choi, Gun ho Lee, Jae hee Kim