Platypus Big Zip SL Hydration System 3.0L discontinued How do I sharpen the

How do I sharpen the serrations on the Spyderco Manbug Wharncliffe MBKWS

170mm (Length) x 22mm (Diameter)

Aerospace-grade aluminum alloy

Designed as the ultimate EDC (every day carry)

1000 Lumens Max Output

Platypus Big Zip SL Hydration System 3.0L discontinued How do I sharpen theThe Big Zip SL reservoir is the most finely tuned hydration reservoir made. Nothing makes staying hydrated easier and, at the end of the day, that means a better day. Proprietary dual layer film features a rugged exterior and a BPA and taste free lining. Wide, BigZip opening swallows drink mixes and ice cubes easily and makes filling, cleaning and drying a snap. Secure SlideLock closure with carry handle ensures an easy, leak free seal All natural