Today's Groupon offers Breath Alcohol Detector Twin-Pack, distributed by Global Fulfillment Ltd.

• Accurate results in four minutes
• Squeeze the middle of the tube between the thumb and finger until the inner casing snaps
• Hold the tube vertically, take a deep breath and blow firmly into the tube for a ­minimum of 12 seconds
• Wait 4 ­minutes and on a hard flat surface tap the tube 3 times until the powder drops to the bottom of the tube
• Compare the test against the colour scale: legal limit exceeded if most of the powder turns light aqua (green/blue)
• This test should be used as a guideline only and does not supersede an official police roadside test
• Use only following instructions provided as incorrect use may produce unreliable results
• Expiry date: 2 years
• Material: plastic and chemical crystals
• Dimensions: 14cm x 9cm x 1 cm
• Weight: 11 grams

Please Note: Do not use if the inner case is cracked or damaged or if the crystals are not yellow in colour. May be hard to read under certain lighting. Best read under white light or in direct sunlight. Results should not be interpreted by anyone with impaired judgement from alcohol or any other substances, or someone who is colour blind or visually impaired. Do not swallow the contents. If accidentally ingested seek medical assistance. Avoid contact with eyes. In case of contact, rinse eyes thoroughly with water. Do not immerse in liquid.Keep out of reach of children and animals. Each tester is disposable and should be used only once.