9 of 11 people found the following review helpful
What a waste,
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This review is from: Cuppow! BNTO Adapter - Wide Mouth Clear 2 Pack (Health and Beauty)
I thought this was a great idea because I take my lunch every day and use Mason jars anyway. I have standard, wide mouth jars and with the added thickness of the BNTO, I can't screw on the lid. I'd return them if I hadn't already washed it and discarded the packaging.