GOSSAMER GEAR Smart Water Bottle Upgrade Kit - is a great enhancement for the water bottle. No searching for the cap if it dropped. The push pull cap screws onto the bottle with a watertight seal, eliminating the cap. Replaces any 28mm bottle cap.

The thick silicone band gives a better grip on the smooth bottle. And the light blue band is glow in the dark.

Gossamer gear says:

WEIGHT

Band: 6 g 

Cap: 6 g

Kit: 24 g