Because I want to get away from plastic containers as storage containers for different foods, came to the idea of using Weck glasses. Since you can close them really well with the clamps and re-open, are now all legumes, cereals etc nice safe these glasses that made me remember the way back to my childhood imemr. :-) I even ordered a smaller variant of glasses, but in the main I take for supporting the big ones. Whether I will ever boil something also remains to be seen, but the odds are good, since some glasses are still unused.