Need: 2 volunteers.
4 (blendable) nice items of food.
4 (blendable) disgusting items of food.
First of all you give them 4 challenges to do, it could be anything from questions to games. The volunteer who does the challenge he best, gets to put a nice item of food into his/her cup. The person that does the challenge the worst, has to put a disgusting item of food into their cup.
When all the Challenges have been completed, and each volunteer has got 4 items of food in their cup. you simply blend the voluteers items of food that they had in their cup, and see who can drink their “drink” the fastest!
Pretty disgusting but always a great laugh!