Add a silicone koozie to protect the glass from breakage!
These drink toppers will fit on any Regular Mouth(2 3/4in or 70mm diameter) jar – half pint, pint, and quart.
Stainless Steel Band and 16.5cm Silicone Straw INCLUDED
Made FDA Approved, BPA Free, Food-Grade Silicone that will not leach harmful chemicals and is dishwasher safe!
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I didn't think it through very well as I bought them for my 3 yr old granddaughter. She would be careful with a glass jar but her younger brother would throw it. So I will have to wait to let her use them or find plastic mason jars.