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The next time you’re shopping for beer in Oregon, take a close look at the bottle. A select few will be thicker and heavier than usual with the word "refillable" stamped into the glass.

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Thousands of refillable bottles from seven craft breweries are popping up on store shelves across the state as part of an effort to bring back a more sustainable way of drinking beer.

Double Mountain Brewery founder Matt Swihart grabs freshly bottled pale ale from the bottling line in Hood River. The brewery's new beer is among the first to be sold in Oregon's new refillable beer bottles. Cassandra Profita / OPB/EarthFix

At Double Mountain Brewery in Hood River, bottling machines are filling a long line of shiny brown refillable beer bottles with a new pale ale.

It’s a triumphant moment for brewery founder Matt Swihart. After six years of being the only brewery in Oregon running a refillable bottle system, Double Mountain finally has company.

"I felt like Don Quixote a little bit, just kind of racing uphill at windmills," Swihart said. "I was called literally crazy and insane for even attempting it, and fellow brewers were speculating that it wouldn’t work."

The system he was using was kind of working. He bought refillable bottles from Canada and asked customers to return them. But he was only getting 15 percent to 20 percent of those bottles back to be cleaned and refilled.

Double Mountain's new six-pack has a label letting customers know the bottles inside are refillable. The bottles themselves also have the word "refillable" stamped into the glass. Cassandra Profita / OPB/EarthFix

Despite the low return rate, he stuck with it because he knew any bottles that came back would cut carbon emissions. They wouldn’t need to be crushed in the recycling system and reheated into new bottles.

“Anything we get back and clean saves us money down the road, and of course is a more responsible environmental package," Swihart said. "Frankly it’s just the right thing to do.”

Swihart said what he really needed was a better system of returning the bottles to his brewery.

Now, he has one. It came along with a new bottle developed by the Oregon Beverage Recycling Cooperative, the group that runs Oregon's famous bottle deposit system with support from major beverage distributors.

The cooperative already has a statewide infrastructure for collecting bottles.

"We’re in a really unique position to make this work," said the cooperative's spokesperson, Joel Schoening. "We're introducing a bottle we can sell to any brewery that's interested in using that bottle."

The new refillable bottle is made mostly from recycled glass at the Owens-Illinois glass manufacturing plant in Northeast Portland. It was designed so it can be easily separated from the rest of the glass in the existing bottle deposit system, Schoening said. That will ensure those bottles get refilled instead of recycled.

For consumers, he said, basically nothing has to change as long as they collect their bottle deposits.

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Oregon's new refillable bottle can be used and reused by any brewery in the state. Cassandra Profita / OPB/EarthFix

“I like to say all the consumer has to do is choose to buy it," he said. “When they go through a machine, they’ll have a unique barcode that will identify them as different from another glass bottle.”

Lisa Morrison, co-owner of the Portland bottle shop Belmont Station and a well-known beer writer and connoisseur, said she remembers her parents returning bottles for reuse – not recycling – when she was a kid in Oklahoma.

"If you look back, that was something that used to happen all the time,” she said.

Belmont Station was one of the places Double Mountain customers could always return their refillable beer bottles. But now, Morrison says, she can leave that job to the Oregon Beverage Recycling Cooperative.

“I think having OBRC in on this is huge," she said. "That’s what’s really going to keep it going.”

At the bottle shop last week, Double Mountain offered free samples of the pale ale and IPA it's is now selling in refillable 12-ounce bottles.

Two six-packs from Double Mountain just joined a 500-milliliter bottle of IPA from Astoria-based Buoy Beer as the first of the new refillable bottle options on the shelves.

Morrison says having beer filling the first batch of refillable bottles is a smart way to sell the concept.

“It’s kind of like our state drink,” she said. “I would like to see Oregon be the trendsetter in this across the country – much like we were with our first bottle deposit.”

It's the first statewide refillable bottle system in the country, and supporters are hoping it might catch on in other states, too.

The first of Oregon's refillable beer bottle options are already hitting store shelves across Oregon. Cassandra Profita/OPB / EarthFix

As it stands, breweries are only allowed to distribute 20 percent of the beer they put in refillable bottles to out-of-state locations. Otherwise, too many bottles would go out and never come back.

Initially, the refillable bottles are being used by seven breweries – including Double Mountain, Widmer Brothers, Buoy Beer, Gigantic, Good Life, Rock Bottom and Wild Ride – for just some of their beers. But Schoening said he fully expects the numbers to grow. He’s already talking with interested cider-makers and wineries about using refillable bottles that might come in different colors.

The cooperative also plans on offering a loyalty program, giving customers a 20 percent return on their bottle deposits – 12 cents back instead of 10 cents – if they bring back a box of 12 refillable bottles.

Right now, the state sees about an 80 percent redemption rate for the containers in its bottle deposit system. If that rate carries over into refillable bottles, Schoening said, the new system will chalk up a lot of carbon savings.

OBRC is talking with the Oregon Department of Environmental Quality about quantifying exactly how much carbon the new program is saving, and they're working on bringing a bottle-washing facility to Portland. Until that facility is built – likely by 2020 – all the refillable bottles will be sent to a facility in Montana to be washed.

But even with that drive, Schoening said, the carbon savings of refillable bottles are big.

"Every time that bottle gets reused, you're cutting the carbon footprint of that bottle in half," Schoening said. "It's the most sustainable choice in the beer aisle."