The lid feels firm enough but susceptible to pressure/sharp objects. No cracks or breaks, so they're pretty sturdy. The lids screw on tight, and they look fantastic.

I keep my premixed acrylic paints in these jars and they're fantastic. Holds just the right amount of ink and is leak proof. Used as paint pots for left over thinned paints after airbrushing my gravity iwata eclipse hp-cs.

Thes little bottles are so fun. They sip great! Nice bottles. Works well.

Jars are the best thing for medicinal products that require small distribution amounts. Highly recommended for water resistance, portability and quality. I prepare and produce tinctures (herbal medicine) from wild plant materials.