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.

I like the ease of refilling these and how you can turn the dial to indicate what is in the container. I suspect they'll be handy for use in the home bathrooms too.