Firefly LED Water Bottle Lid

World's most technical water bottle cap becomes a lantern after dark.

Features:

• 7 white LEDs integrated into the underside of the lid

• Variable light levels — nightlight to reading lamp

• 3 AAA batteries provide 25 hours of illumination

• Works with all standard wide–mouth bottles

• Can be used right side up or upside down

• Electronics in sealed compartment

• Sterling climbing rope cable attaches lid to jar

• Crack–resistant in extreme temperatures

• Glass–reinforced plastic lid for tight seal

From Guyot.

$15 when it becomes available this spring.

[via Brian Lam and Wired magazine]