Wroskay 50Pcs Paint Sprayer Cup Liners,7.8‘’ X 11.8‘’ Paint Sprayer Bags, Gun Cup Can Liner,Sprayer Accessory,Easy Color and Material Changes

A simple disposable liner that makes spraying less of a chore

I’ve long believed that one of the biggest barriers to using a sprayer is cleanup. If washing out a paint cup feels like a sink-side wrestling match, you’ll reach for a brush or roller more often than you should. The Wroskay liners aim squarely at that friction point. They’re clear, thin, 7.8" x 11.8" bag liners you nest inside a standard spray-gun cup. Fill the bag, fold it over the rim, screw the cup on, spray, then pull the bag and toss it. It’s a humble accessory, but for me it’s the kind that actually changes how often I use my tools.

What you get

• Fifty transparent liners in a simple storage pouch
• A generic size that fits most handheld airless/turbine sprayers and many 1-quart siphon-cup HVLP guns
• No hard collar, no proprietary adapters—just bags

These are not a pressurized cup system like 3M PPS. They’re disposable liners for traditional cups, which makes them inexpensive and broadly compatible, but also means you rely on the cup’s existing vent, gasket, and pickup tube.

Setup and fit

My primary tests were with a handheld airless “power painter” and a small turbine HVLP with a 1-quart metal cup. In both cases, the liners fit without drama:

• I drop the liner in, press it into the corners, fill halfway, and gently squeeze the bag to burp excess air.
• I fold the bag’s top edge over the cup’s rim, making sure it lies flat where the lid gasket will seal.
• On the HVLP, I add a light elastic band to keep the liner snug while threading the cup on.

On a gravity-feed HVLP (cup above the gun), it’s trickier. Because those cups run inverted, any slack in the liner can wander toward the outlet. I could make it work by taping the liner to the cup wall and trimming excess, but I wouldn’t call that a primary use case. For siphon cups and handheld airless styles, the liners feel purpose-made.

Performance and flow

With water-based paint (interior latex cut per sprayer spec) and water-based deck stain, flow was consistent and clog-free. A nice side effect is that the liner acts like a barrier: skinning and dried flecks along the cup wall were nonexistent, which in turn reduced tip spitting later in the session.

One thing to watch: the pickup tube can occasionally suck the liner against its inlet if you leave big wrinkles around the bottom. I avoid that by:

• Pre-seating the liner flat at the bottom before filling
• Keeping the pickup tube centered
• For long sessions, dropping a small stainless spring or paperclip at the inlet as a standoff

It’s a simple precaution that keeps the liner from ever star-fishing over the pickup.

Cleanup and color changes

This is where the liners earn their keep. At the end of a pass, I pull the bag, squeegee what’s left back into the can by pinching and sliding, then twist-tie the neck if I’m coming back to the same color later. For short breaks, I’ve also bagged a damp brush or roller in a spare liner and tied it off—it’s not glamorous, but it keeps tools wet without a trip to the sink.

Color changes are nearly instant. Swap liners, a quick prime, and I’m spraying the next shade. The cup stays basically clean, and I’m not sacrificing a half-cup of paint every time I rinse. For me, that’s the difference between “I’ll spray it” and “Eh, I’ll roll it.”

Durability and leaks

The material is thinner than a typical freezer-grade bag, which is good for conformity and waste reduction but demands some care. Out of the pack I used, most liners were trouble-free, but I did hit one pinhole leak that left a little paint between liner and cup. No disaster—just an extra wipe—but it underlines a tip I now follow: when you seat a fresh liner, add a splash of water and give it a quick shake over a sink. If you see moisture outside the liner, swap it before you pour paint.

Tear resistance is decent. I’ve turned these inside out to reclaim paint, rinsed, and even reused a few for staging when I’m mid-project. But I treat reuse as a convenience, not a guarantee—the value proposition is still “use and toss” to keep cleanup zeroed out.

Compatibility and materials

• Water-based paints and stains: Great fit. No softening, no seams lifting.
• Solvent-based (enamels, lacquers, strong reducers): I proceed cautiously. Short exposure was fine in my tests, but I wouldn’t store hot solvents in the liner or leave them parked for hours. If you spray a lot of solvent systems, a true disposable cup system with known chemical compatibility is the safer move.
• Temperature: Don’t heat; if you warm paint for viscosity reasons, do it before it hits the liner.

Compared with alternatives

• No liner: Cheapest on paper, most expensive in time. You’ll scrub more, waste more paint during rinse-out, and risk dried bits around the rim.
• Zip-top bags: They can work in a pinch, but the zipper ridge can interrupt sealing, and the sizing is inconsistent. The Wroskay liners sit flatter on the rim and thread cleanly under the cup lid gasket.
• Proprietary cup systems (e.g., PPS): Far superior for gravity-feed and solvent-heavy workflows, with better venting and sealed spraying. Also far pricier. If you’re a production finisher, that investment makes sense. For general painting and handheld sprayers, these liners hit the value sweet spot.

Small workflow wins

• Batch mixing: For large jobs, I’ve mixed a single, strained batch and filled multiple liners ahead of time. Label with painter’s tape and stack them upright in a small bin. Swapping is then as fast as twisting on a new cup.
• Squeezing out waste: Because the plastic is pliable, you can press nearly everything back into the can at the end—more economical than hard liners.
• Organization: The included pouch is basic but handy. I keep a handful in the sprayer case so I’m never tempted to skip them.

Tips to get the most out of them

• Leak test new liners with a splash of water over a sink.
• Seat the bottom flat; avoid sharp folds near the pickup tube.
• Don’t overfill—leave space so the liner can fold over the rim without bunching.
• Purge air. A gentle squeeze before sealing reduces sputter on startup.
• Use an elastic band to hold the liner while threading the cup.
• If flow falters mid-job, check for liner creep over the inlet and correct with a small standoff.
• Avoid long soaks with hot solvents; transfer and dispose promptly.

Limitations

These are generic, thin liners. They’re not a cure-all for every gun and every chemistry. On inverted gravity cups, they’re fussy. With harsh solvents, they’re a short-timer, not a storage solution. And you may encounter the occasional dud with a pinhole seam. If your work is high-solvent or you demand a sealed, upside-down workflow, step up to a dedicated cup system.

The bottom line

The Wroskay liners did exactly what I hoped: they removed the mental tax of cleanup and made color changes routine. I used my sprayers more, wasted less paint, and spent far less time at the sink. Outside of one leaker in the pack and the expected limitations with gravity-feed guns and strong solvents, they were reliable.

Recommendation: I recommend these liners for anyone using handheld airless sprayers or siphon-cup HVLP guns with water-based materials. They’re inexpensive, broadly compatible, and they cut cleanup to near zero—enough to change your spraying habits. If you primarily run gravity-feed guns or solvent-heavy coatings, they’re a stopgap at best; consider a sealed disposable cup system instead. For DIYers and many pros working with latex, acrylics, and stains, the Wroskay liners are an easy, practical upgrade.