Buy ‘filter’ with Bitcoin Crypto-Currency – Spendabit

Olimex USB-CAP Low-ESR Filter for Current-Hungry Devices

$4.72 at The Pi Hut

Catalytic Activated Carbon Replacement Filter (Chloramines)

$43.55 at Canada Ionizers

PF-207 Replacement Filter Only

$109 at Canada Ionizers

SilverStone 120mm Honeycomb Fan Grille Dust Filter White

$4.04 at Scan Computers

GoldTone Activated Charcoal Water Filters Replaces All KEURIG & BREVILLE Coffee Machines, Replacement 1.0 2.0 BWF100 (6 Pack)

$7.00 at Overstock.com

GoldTone 8-12 Cup Reusable #4 Cone Coffee Filter for CUISINART & (12 Pack) Replacement Charcoal Water Filters

$16.49 at Overstock.com

GoldTone Activated Charcoal Water Filters Fits All KEURIG Coffee Machines, Mini, Classic 1.0, 2.0 Replacement Filter (12 Pack)

$9.49 at Overstock.com

GoldTone Reusable Kcup Coffee Filter Fits Keurig 1.0 K Cup - Permanent Reusable Single Serve Replacement Filter (2 Pack)

$9.99 at Overstock.com

GoldTone Reusable 8-12 Cup Basket Style Filter Replacement Fits CUISINART Coffee Machines and Brewers, BPA Free (1 Pack)

$8.19 at Overstock.com

Akasa Fan Filter in Aluminium for 140mm (14cm) Fans

$5.38 at Scan Computers

GoldTone Reusable 8-12 Cup Basket Filter Replacement Fits ALL Black and Decker Coffee Machines and Brewers, BPA Free (1 Pack)

$7.00 at Overstock.com

Tube Supreme Flavoured Joint Filters (50pcs) Strawberry

$5.72 at Bongify

Blendin My K-cup Single Reusable Coffee Filter for Keurig B40,B41,B44,B45,B50,B60,B65,B70,B75,B77,B79,K10,K40,K45,3 Pack

$9.99 at Overstock.com

Marlboro Filter Black

$4.59 at CigaretKretek

Flamez Filter Tips-Box (50 Booklets)

$0.25 at Bongify

Black 80mm Aluminium fan filter from Akasa GRM80-AL01-BK

$4.04 at Scan Computers

'actiTube' Activated Carbon Filters

$2.42 at Bongify

Chanson Shower Filter Replacement Media

$39.92 at Canada Ionizers

MouthPeace Filter for Mini

$7.99 at Smokin Js

MouthPeace Pipe Filter

$12.99 at Smokin Js

Frutta Cigarette Filter Tubes (Apple/Mint Flavour)

$7.24 at Bongify

Silicone Bong Filter

$0.96 at Bongify