Update: The price has now gone back up. You can still get the Disney Fairies 3pk for $3.48.
Amazon currently has a 3pk of Disney Take and Toss Sippy Cups marked down to just $1.48! Shipping is also free with an order over $25 or with your Amazon Mom or Amazon Mom Amazon Prime trial membership.
These cups also have some pretty good customer ratings. Please keep in mind that prices can change quickly on Amazon, so I cannot guarantee how long this one will be around!