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They do come with rubber seals for a tighter closure and the lids have knobs to make them easier to handle.
You can wash them in the dishwasher but a hand wash is recommended.
The labels are done in black printing.
If you are not sure of the bright yellow shade in these jars, the makers also do a variety of other spotted storage jars in red, pink, grey and polka dots as well as other themes too.
See more Yellow Kitchen Storage Jars here