1. omenala anyanwụ okpu na sara mbara n'ọnụ nke e biri ebi ụkpụrụ.
2. Okpu nwere nnukwu ọnụ nwere ike igbochi anyanwụ ma zere ọkụ ọkụ UV na ihu.
3. A na-ebipụta n'ime ọnụ ọnụ, ya mere ị nwere ike ịhazi ụkpụrụ ọkacha mmasị gị na okpu.
4. Okpu na-abịa na drawstring nke nwere ike gbanwee na-adịghị mma, dị mma na nke bara uru.