Some households have an abundance of well-loved and well-used baseball caps. And as the baseball cap collection grows, there's an increasing need to consider how the caps are stored.

The Cap Rack from Jokari, with its "stretch tension system" and its "lo-profile spring steel door hooks"  will fit on most residential doors. The doors in dorms and commercial buildings, which are usually 1.75 inches thick, require different hooks. (Unfortunately, this information is buried in the installation instructions, and not everyone notices that before purchasing the product.)

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But this system seems extremely easy to install; I have no knack for such things, and I could certainly install this one in no time. It can also be modified to hang from a wall.

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The major concern expressed by some purchasers is that the caps sometimes fall off those hooks. And, of course, it's hard to see all the caps if the end users double up on a hooks, as Jokari suggests they do.

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Perfect Curve has a different over-the-door cap rack system where the caps face outward. This makes it easier to see what's what, but will also take a bit more space.  The hook will fit over both residential or commercial doors, and it the rack can also hang from a ceiling hook or get mounted on a wall.

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The clips used in this system hold the caps securely and help maintain their shape. The trade-off: It's a little more work to put the caps away than with the Jokari product, and that extra work means some end-users just won't use it.

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The 18-cap system has three feet of cord and 6 clips; the 36-cap system has five feet of cord and 12 clips. Each clip can hold three caps. But again, when multiple caps go on a single clip, the bottom ones are hard to see.

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Another back-of-the-door design come from Organize It All, with its 24-pocket design. The idea is nice, because it's extremely easy to put the caps away and to see all 24 of them. However, a number of buyers have complained that the pockets aren't deep enough, and their caps fall out. It's interesting that some web sites position this as a baseball cap organizer, and others don't; it may work fine for other types of hats. But it would be nice to see a similar design that did work well for baseball caps.

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Caps could also be hung inside a closet, rather than on a door. The New Era Storage System takes a design that's often used for shoes and sweaters and sizes it for caps. The handle, with its hook and loop closure, wraps around a closet rod. However, not all end users will have sufficient closet space for this type of product.

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The Cap Hangup from Master Craft Products is a hang-in-the-closet design which takes  much less space. But it will only work with adjustable caps, not fitted ones, since the loops go through the caps' adjustable size tabs.

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Wall-mounted baseball cap racks, such as the ones from Stoughton's Woodsmith, provide another design that allows the caps to be stored upright and readily visible. It would be very easy to hang a cap up on this rack, increasing the chances that the rack would actually get used.

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While retail fixtures aren't often considered for home furnishings, I can see some of these racks being used for those with larger cap collections—or those who want to use the caps as decor and show them off. The floor model can hold up to 144 caps, which would mean 12 per shelf—more than most people are going to have. But this could also display 12 caps nicely, or provide easy storage for a large collection that's nowhere near 144 caps.

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Sometimes end users will want to protect their caps from dust and/or bugs, and the Evelots baseball cap storage bag will provide that protection. It's a product that could possibly go under the bed (although that's inconvenient to get to) or on a closet shelf. One caution: The bag is plastic with no obvious ventilation (unless it's left partially unzipped), which could possibly lead to mold problems if the interior becomes moist. Also, textiles kept in some plastics can cause yellowing of the items stored within it; hopefully this is made from a plastic that doesn't cause such problems. I've seen no complaints about mold or yellowing in the online reviews. 

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Those who really treasure their cap collections might appreciate a product that provides more protection, such as this Neoprene case for transporting and storing baseball caps. It has multiple eyelets for ventilation, and the hard shell would keep it safe from pets and other sources of potential damage. It's not going to keep the caps visible, though, as it's designed more for travel than simply in-house storage.

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The Kapz from Rakku was a unique design that seemed interesting. There aren't that many tabletop options, and the Kapz provided a nice display and seemed pretty easy to use. The Kickstarter got canceled, though, and it appears this product never hit the market.