Great solution for those with bulk hand sanitizer who want to bring it on the go [SEP] I got these to clip to my bag. I kept losing my hand sanitizer! I really like the style of the kinds that clip to your bag with the silicone jackets, but the inside is still plastic and they're not meant for long term use. Enter these guys. You can refill them from your bulk hand sanitizer at home, and you never lose it and it doesn't take up valuable space in your bag. Haven't had any issues with it leaking or the top popping off. I wouldn't use these for edible items though and I would suggest that you run them through the dishwasher first..they do have a very faint smell but not as much as some silicone things I've gotten on Amazon. Overall a great buy and solution for bringing hand sanitizer with you!