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Are there benefits of using fliptops vs screwcaps on growlers?

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7 answers

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It really depends of the quality of the product and seal.

Plastic screwtops for glass growlers often have Styrofoam inner linings.
These are very porous and with use will fail, letting air in. Silicon linings for screw tops are more durable and you can really crank them down so most work pretty good. 

Fliptops tend to hold the pressure in better than screwtops in our opinion and many others. That is why we went with flip/swing tops. From the hundreds of brewers we work with , they believe fliptops are better. One instance a brewer told me that he had put an SS Growler fliptop in the freezer and forgot about it. He shared that the bottom popped off before the lid failed. I told him we tested our SS Growlers with Mentos and Coca Cola!

The main advantage to screwtops is usually the price.
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0

It is a preference and each comes with it's advantages. Screw caps are cost effective and easily replaced. However, a screw cap will not maintain the integrity of the beer as long as flip top will. 
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In my experience. Packaging sells! the better the package and image the higher the margin.  If you want to compare the results get a jug with screw cap and have the flip-top growler next to it. Ask your customers which they prefer.  I believe you will have a pallet of jugs and be re-ordering flip -tops much sooner even with a higher price for the growler.
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It depends on the style of the fliptops as well as screw tops.   The 2 liter keg growler has one of the best seals on the market, but its a threaded metal screw top with an o ring.   Most basic metal growler screw caps fail over time.  Fliptops do have a better seal, but the ceramic perform better then the plastic swing tops.
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No, but when buying a screw cap make sure you but the phenolic caps
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Simply, you can't lose the cap and the seal on the flip top creates a better seal.
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There are certainly benefits to both options, some of it simply comes down to preference and function.

Fliptop options tend to preserve the quality of the beer longer and offer a more high end look, which has great appeal to many breweries.  The downside is they are only available on certain bottle styles so your options are a bit more limited.

Screwcaps tend to be more cost effective and are easily reusable and replaceable.  They are also more universal with standard growler styles and available in plastic or metal.  That being said, they don't offer the upscale look and longer shelflife that a fliptop closure can offer.  
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