Meritline.com offers this Personal Alcohol Breathalyzer Keychain for $4.93. Coupon code MLCKB09DNL1 cuts it to 99 cents. With $2.41 for shipping, that's a buck under our mention from a year ago and the lowest total price we could find now by $1. This multi-function tool serves as a breathalyzer, clock, flashlight, and parking timer. Coupon expires after 300 uses.
Expect this item to take two to three weeks to arrive.

Regular Price: $4.93

BUY NOW: $1 + $2 s&h at Meritline