What are 5 totally distinct, creative ways to use a glass of water?

1. Pour half the water out and set the glass on a bedside table as a gentle reminder to look at life as "half full"
2. Dampen t-shirt so others perceive the water as sweat and assume you are working out super hard
3. Break the glass and use the shards to cut fabric similar to a knife or pair of scissors
4. Balance on top of head in order to improve focus and balance while risking getting wet
5. Quickly invert on a table and attempt to prevent water from escaping as a real-time test of liquid physics