Jar Store 22-400 Black Polycone Cap | 12 Pack

Our 22-400 mm polycone caps are the most secure cap for our 4 oz Boston Round Bottles and are suitable for liquids that may evaporate or leak. This cap is not approved for corrosive materials and can not be used in an autoclave. 

Looking for a matching bottle?

With a 22-400 cap finish, these caps are specifically designed to fit our 4 oz Glass Boston Round Bottles.