The i.Fuzz is a light-weight, semi-disposable multimedia appliance that enables users to leave pre-recorded messages at different physical locations to be serendipitously discovered by one’s intimate other.
Source: Vetere, F., Gibbs, M. R., Kjeldskov, J., et al. 2005. Mediating intimacy: Designing Technologies to Support Strong-Tie Relationships. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI’05). ACM Press, 471–480.