We switched out the collectors from the catchment system, threw in the purification tablets, and were done.

Bear was to take Chalk up on the roof and retrieve the water storage cylinders, which would have absorbed their purification tablets by now.

It ain't far from where we went for the purification tablets a few days back.

Mountain streams are a ready source of water, but take purification tablets.

Hikers must carry their own water or purification tablets.

I've got plenty of purification tablets in there.

They are told to boil the river water and they have been given purification tablets.

He took the opportunity to fill one of his canteens, dropping in a purification tablet as he did so.

Land finally laughed too, after he saw one of the other men trying to put some purification tablets in a canteen spill half the water.

The kit, weighing just 12 oz, includes 48 purification tablets and will treat 0.5 ltr of water at a time.