The clips on Glasslock lids break off after a while, as all “living hinge” designs eventually will. Rather than throw away the lid, use these replacement clips.
I have two clips here. One for square or rectangular containers, and one for the 6" round containers. Be aware that the square and rectangular containers have notches in the glass lip where the clips go; you can't put the clip on just anywhere.
The author marked this model as their own original creation.