Andrew Armstrong

Black and Blum charcoal water bottle
Yes, just what I needed! A water bottle with a stick in it! My life is complete! #winning
Interestingly a question prompted me to calculate this against a competitor:
Brita Fill & Go water filters = £26.40 (16 pack ) = 16 weeks = £1.65 per week
Black and Blum Stick = £4.95 (1 pack) = 6 months = £0.20 per week
Bottle cost = about the same, around £15.00
The running costs on the Brita are about nine times dearer (£85.80 per year vs £9.90 per year) and still be considerably cheaper.
Amazon sells these beasts, they really do work well: