Hmm Ive waited till the last minute because I figured every vape shop would have these. Im takkng off for vegas sunday and ive read that litium batteries must be in a short proof case and brought with your carry on items. Turns out no vape shop in town, radioshack, best buy or batteries plus sell them. My 18650 fits perfectly in a plastic pill bottle. Any suggestions on where to look or do you think the pill bottle would be ok?