It’s official: After months of testing—and years of buying inferior chip clips and other closures that we found in stores—we can proclaim that Banana Seal is the best bag sealer we’ve ever tried.

Airtight, watertight, foolproof and easy to use, chip clips and other fasteners can’t begin to compete. The patented design provides a guaranteed airtight seal on any bag, in any condition.

Use it on any type of bag: chips, cereal, coffee, cookies, greens, pet food, sugar and flour, anything in the pantry or freezer.

A center rod, the “banana,” locks firmly into a U-shaped seal. There are wider versions for pet and lawn products.

It’s amazing how crisp our chips have stayed, a month after opening the bag.

We couldn’t be happier.

Single large-size Banana Seals can be found for $1.50 and $4.99 for a 4-pack; tubes of 18 seals in assorted sizes (7.5″, 9.5″ and 11.5″) are $19.99 at hardware stores and other retailers (try Rite-Aid) nationwide. The 18-piece assortment is available online for $18.00 at Seal-A-Bag.com.

Custom sizes can be created by cutting a Banana Seal with scissors. The product is dishwasher-safe.

If you want one size only, we found something similar on Amazon, available in small, medium and large widths; 10 seals for $8.99, $10.99 and $14.99, depending on size.