Features:

Japanese binchotan charcoal from Kishu, the highest grade
Absorbs impurities from water, resulting in pure, great tasting water (filtering time is approximately 3-4 hours)
Use 1 stick for personal water bottle and use 2 sticks for carafe; each stick is approximately 0.8" in diameter and 4" in length
Reactivate charcoal every two weeks by boiling for 10 minutes and letting dry
Material: binchotan (Japanese Oak) charcoal from Kishu, Japan

DOGS FIRST SAYS - If your dog has recurring gut issues (or even if they don't) you need to get chlorine out of the water (chlorine is used to kill bacteria in water but it also kills the bacteria in your guts). These do it, quick and easy.

https://dogsfirst.ie/health-issues/allergies-dogs-part-4-hypoallergenic-dog-food/

Charcoal Water Purifying Sticks, Set of 2, Fits Water Bottles