Are you trying to drink more water? If you're not used to it yet, remembering to drink water can be a challenge. It would be nice if someone could just tap you on the shoulder and remind you, "Hey. Martha. It's time for water." (This would be weird if your name isn't "Martha" but you can't be too picky with water reminder people.) Now, there's Ulla! It's a little sensor that's powered by light and fits onto any water bottle. When it senses that you're behind in drinking water, a little light starts blinking, catching your peripheral vision and reminding you to drink. It comes in 9 different designs and is only $25! Get drinking! (Thanks, Sam!)