UltrAspire UA Cup
Here's what other sites are saying:
The UltrAspire Race Cup greatly reduces the amount of waste generation and environmental impact of a paper cup. With a minimalist profile, this reusable cup packs away nicely or can be clipped to your pack. This lightweight, reusable cup is perfect for race events. From start to finish a runner uses an average of 3 paper cups in a 5k race. A marathon with 5,000 runners uses an average of 55,000 paper cups. Reduce waste while maintaining a way to rehydrate.