I got 5 to try. I filled 2 with 2 different juices let them sit for 1 hour and tried them. First 2 hits ok 3rd a little funny taste 4th burnt taste. I took off the tops checked them, looked wet, but added a few more drops to make sure and let them sit for 24 hours. Came home from work the next day and tried them... same thing 3 hits ok 4th burnt. I didnt even try the other 3 , I just went back to the Boge 2.0. I did comdom fill these also so I know they were full. They can hold 2.5ml. I tried them with a KGO 1100mah.