on Tina's $20 Healthy Challenge. I use it to drink my water. I need a lot of water and during the winter months I don't drink enough. So I used Tina's challenge to save $1 for every day I drink all my water. This is day three-- so $3 goes towards the total for this month. At the end of the month, I'm going to put the extra money on the credit card of the moment. It is a great way to challenge me to drink what I need. The only thing is that my challenge month and my budget month don't coincide. I guess I just like to confuse myself to make things more interesting.....