Devices and methods for verifying a sample volume

An apparatus, comprising:

• a sleeve having an open proximal end portion and an open distal end portion, the sleeve having an inner surface defining an inner volume, the sleeve configured to be movably fitted around an exterior surface of a sample reservoir defining an inner volume configured to receive a volume of bodily fluid, the inner volume of the sample reservoir containing an additive;
• and
• a first indicator and a second indicator, each of the first indicator and the second indicator coupled to or formed at least in part by the inner surface of the sleeve,
• the sleeve when coupled to the sample reservoir configured to (i) place the first indicator in a first position along a length of the sample reservoir associated with a surface of the additive and (ii) place the second indicator in a second position along the length of the sample reservoir associated with a predetermined fill volume when bodily fluid is transferred to the inner volume, the predetermined volume based at least in part on the additive contained in the inner volume of the sample reservoir.