Review on 🧴 Humangear Toiletries Refillable Silicone Bottles by Elizabeth Carrasco

I bought these in 2015 and have used them on several trips. My experience is that they are not 100% tight. Ultimately, it's the liquid that matters, regardless of viscosity. Nothing leaked the first time it was used (after pouring the liquid into 3 bottles). But when I used the one that had vegetable oil in it, it leaked after first opening. What leaks: Any cooking oil (e.g. coconut oil, olive oil) Raw honey What doesn't leak: Sunscreen (e.g. La Roche-Posay SPF 50 Anthelios) - Hair conditioner