A disposal receptacle having a biocidal interior surface for storing contaminated biotesting devices therein. The receptacle contains a one-way opening or valve to prevent used biotesting devices and bodily fluid from escaping or being removed from the receptacle; however, the one-way opening allows for insertion of the used biotesting devices therein. The biocidal interior surface and one-way valve in the receptacle form a sanitary method of containing contaminated biotesting devices. This combination allows the user to dispose of the receptacle, and safely and hygienically dispose of any contaminated biotesting devices and bodily fluid therein. The receptacle can be combined with a receptacle for unused biotesting devices, and/or sized to fit with or within a medical device, such as a test meter. In one form, the receptacle can be part of a care kit having a kit container for storing a lancing device, a testing device, and the disposal receptacle.