Aijiren nwere ike ịnye vials nchekwa nke nkọwa dị iche iche, nke a na-ejikarị maka nyocha mmiri na ala. Enwere ike ịkpọ ụdị nchekwa nchekwa a vial EPA, akpan akpan 40ml ịghasa okpu EPA vial. Ike nchekwa nke EPA ịghasa-top karama bụ 20ml-60ml, dị ka 20ml, 30ml, 40ml, na 60ml.