Snacks, rare Indian Head coins, baby wipes: What don’t U.S. Open golfers store in their bags?

So what’s in a golf bag?

Clubs, golf balls and tees are a staple.

Alligator skin yardage books, almond butter and jelly sandwiches, rare Indian Head pennies and 7-Eleven compartments?

That just depends on the golfer.

With all the walking it takes to complete a round at Chambers Bay, the golfers try to keep the bags light for their caddies without leaving behind the essentials.

The bags can range from about 30-50 pounds depending on if they’re also packing rain gear.

“The last thing you want to do is have an umbrella when you don’t need one,” said Kevin Na’s caddie, Kenneth Harms.

“Did you show him the 7-Eleven compartment?” Na asks.

Harms then unzips a compartment in the golf bag. Inside are Clif Bars, an EAS Lean 15 bar, Kind bar, three different types of sunscreen, Advil, a string line Harms said they haven’t used in about a year and Chef’s Cut jerky among other things. Normally trail mix too, but they had already eaten that.

“It’s usually a lot worse,” Na said.

His ball marker has “Na” engraved on it and he said was made by Nextbelt — the same company that made his belt with his last name engraved on the buckle.

Dustin Johnson had a bag of about 20 quarters laying near some almond butter and jelly sandwiches and a Swiss Army knife. He uses the quarters for ball markers and they are all from the 1960s.

“So ’65, he’ll want to shoot 65,” said Johnson’s caddie and brother Austin Johnson. And a 5-under 65 is exactly what Johnson posted Thursday.

Sebastian Cappelen’s ball marker is a bit more sentimental.

It’s a graduation gift he received from his fiancee, Audrey Dunn, and it has his initials engraved on one side and hers on the other.

He also had SPF 30 sunscreen, tape for fingers and some snacks in his bag.

“Normally we just grab a couple of bananas,” said his caddie, Carsten Drud.

University of Washington graduate Richard Lee had hair ties (for his hair that reaches his shoulders), coconut chips and sweaters.

Sam Saunders, the grandson of Arnold Palmer, had some of the usual items in his bag – check book, chap stick, gloves, extra towel — but also an alligator skin yardage book (made from an actual alligator Saunders hunted about four years ago, said Saunders’ caddie, Travis McAlister) and some rare Indian Head pennies.

He uses the coins, stuffed inside a Crown Royal bag along with a Band Aid, divot fixer and another tool, for ball markers.

“He got these from a guy on the Tour and he’s kept it ever since,” McAlister said of the coins. “He really likes old, rare artifacts.”

Central Kitsap High School and UW graduate Troy Kelly had a first-aid kit with extra contact lenses in his bag. But also baby wipes.

“In case you got to … make a stop,” said his caddie and brother Ryan Kelly. “That’s a constant.”

Some of the caddies appeared fairly pleased with the weight on their bags. Austin Johnson said caddies can’t be caught complaining.

But that doesn’t mean lugging a bag around for 18 holes isn’t a chore.

“Six golf balls, six tees — don’t lose them,” Colin Montgomerie’s caddie, Alastair McLean, joked. “Might have to get rid of some of these clubs he’s not using. You don’t use it today, out tomorrow.”

And the most important item, of course, are the clubs themselves.

The clubs of 2015 NCAA men’s golf champion Bryson DeChambeau all have a 7-iron shaft. The physics major switched to the same 37.5-inch shafts on all his clubs so he can keep the same posture, no matter the club.

“He’s a scientist playing golf,” said DeChambeau’s caddie, Bobby Schaeffer. “It’s the most unique set in this tournament, without a doubt.”

Though it appears that almost every golfer’s bag is unique in some way.