The lid feels firm enough but susceptible to pressure/sharp objects. These are well made and sturdy, the lids are secure and perfect for what i am using them for. I prepare and produce tinctures (herbal medicine) from wild plant materials.

These are wonderful and server their purpose perfectly. They sip great! Nice bottles.

Received package with lots of dirt inside. These are not 10 ml tubes- they are 15! The tube in the middle are the tubes i received.