Verdict
Head-to-head · Best Backpacking Water Filters

MSR TrailShot vs Platypus GravityWorks 4L

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Platypus GravityWorks 4L comes out ahead by a narrow margin (4.5 vs 4.6). The gap is mostly about backpacking groups of 3+ — read the strengths below before deciding.

MSR TrailShot
Ranked #5 in Best Backpacking Water Filters
MSR TrailShot
$55

The TrailShot is the shallow-water pick — MSR's pump filter that works in puddles and small streams.

Strengths
  • Pump-action — pull water from shallow sources
  • Compact 5 oz
  • No bag to manage
Watch-outs
  • Hand-pump fatigue on long sessions
  • Slower than Squeeze
  • MSR's customer support variable
Platypus GravityWorks 4L
Higher ratedRanked #4 in Best Backpacking Water Filters
Platypus GravityWorks 4L
$120

The GravityWorks 4L is the group pick — best for filtering large volumes hands-free for multiple people.

Strengths
  • 4-liter capacity — best for groups
  • Gravity-fed (hands-free)
  • Fast filter rate
Watch-outs
  • Bulky for solo trips
  • Most expensive
  • Two-bag system to manage

How they stack up

MSR TrailShot

Pump-action. Works in shallow water. Hand fatigue.

Platypus GravityWorks 4L

Best for groups. Gravity-fed. Most expensive.

Specs side-by-side

SpecMSR TrailShotPlatypus GravityWorks 4L
TypePumpGravity
Weight5 oz
SourceShallow capable
BrandMSRPlatypus
Capacity4L
FlowFast
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