Spikey is a small plastic single use stopper that prevents your drink from being spiked when left unattended. The device is inserted into the neck of a bottle, leaving a hole that is only big enough for a straw to pass through. Naturally, this would make it much more difficult to slip drugs or alcohol into the drink.
A pack of 10 randomly colored fluorescent Spikeys will run you about £0.82 ( $1.64 ). Discounts are available for bulk orders.