Cos sometimes I can't be distracted/bothered to look :-)
You need never run out of beer again!
The tankard will tell you when it's full - but most importantly, an alert sounds when it's empty and a refill is required.
Transparent with silver handle and base.
Requires 2 x AA batteries (included).
Link - http://www.argos.co.uk/static/Product/partNumber/2705860/Trail/searchtext%3ETALKING.htm
Seriously though, great as a stocking filler or pressie for a mate. Also, good to get you into the 5 or 10 pound voucher bracket