I bought starter kit with e-pen and after three days of using the pen it stopped working completely. In the meantime I ordered some caps for it from vype website, so to be able to use them I bought another e-pen, which also stopped working but this time after one day. I'm very not happy with e-pen product, but I must say the vanilla infused liquid is awsome. I't s just a shame I wasn't able even to use even one full refill I bought. So I'm left with many refills and no e-pen but definitely not gonna buy another one. It's just a waste of money. I think it's kind of faulty product because it didn't happened with one but two e-pens.