These light blue, silicone rings are just the perfect airtight seal to the glass seal jar (210BOKA100), 5 oz. mini glass seal jar (210BOKA150), 6.8 oz. mini glass seal jar (210BOKA200). They will ensure that no air is going into the jar and that your products will stay fresh longer! Prefer another color? Check out: Light or lime green, red, acqua blue, black and transparent.