2 Pack - Fits *4oz* Mason Jars (The Tiny Ones) - Check the pictures if you aren't sure what size jar you have. 4oz Mason jars look like a small bowl and are 2 3/8" internal diameter. Use them for baby food, baby bottles, toddler drinking cups, shot or shooter glasses, espresso cups, condiment cups, snacks, dressing, dips, stash jars, or anything else.
Prevent Breakage - Twice as thick as competing brands, for much better insulation and drop protection.
Protect Your Hand From Hot and Cold - Perfect for heating up food or beverages in the microwave.
Multi Purpose - Espresso and food are all tastier from a Mason jar. Add a leak proof lid and bring food to work or school.
Food Grade Silicone Rubber - Dishwasher, freezer, and microwave safe. Silicone is a safe, BPA-free material for food use that does not leach any chemicals.