When did you first test your prototype?

We built it on May 4th (Week 5) and on the same day tested it with a cup of soy sauce mixed with tap water.  The water came out clear, and we all successfully consumed it and are still alive today.  Later that week in class on Friday (May 8th, start of Week 6) was the first time we tested out the prototype with the three actual solutions we'll be filtering in the final presentation.