ZENS Airtight Borosilicate Glass Jars, 4 Pack, 10 oz Each, Glass Lids

The seal is a silicone ring set into a screw-down glass lid; closing one pushes air out with an audible sigh, which is the maker's own test that a jar has sealed.

Glass is borosilicate, quoted at 3 mm thick — heavier in the hand than ordinary jar glass, and clear rather than tinted.

Ten fluid ounces apiece, four to a set, each 3.62 inches across and 3.35 high. Listed item weight is 0.63 lb.

The lid is glass rather than bamboo, so it can be turned over and used as a small dish.

The maker states the jars take the dishwasher and the microwave.

One thing to check: the product name mentions labels, while the components list names only jar, lid and silicone ring. Size suits spices, loose tea, herbs or sugar rather than bulk flour.

• 4 jars, 10 fl oz each
• 3 mm borosilicate glass
• Screw-down glass lid with a silicone seal
• 3.62 in across, 3.35 in tall
• Rated for dishwasher and microwave
• Labels named in the title but not the parts list