A system for providing a liquid-substance mixture attractive to an animal comprises separate first and second containers (1, 2) which are closed prior to assembly. The first container (1) is made of an autoclavable material and comprises a first reservoir (11) for holding a liquid attractive to an animal and at least one first weakened portion (115) and first cutting means (114). The second container (2) comprises a second reservoir (20) for holding a substance to be administered to the animal, and at least one second weakened portion (205) and second cutting means (202). Upon assembly of the first and second containers (1, 2) the at least one second weakened portion (205) is cut by the first cutting means (114) and the at least one first weakened portion (115) is cut by the second cutting means (202). Thus, the first and second reservoirs (11, 20) are set in communication with one another to allow mixing of the liquid with the substance to form the liquid-substance mixture.
