What is the risk associated with the substances stored in a 'shake and bake' bottle?

The substances stored in a 'shake and bake' bottle, commonly associated with the illicit production of methamphetamine, present significant hazards. The correct answer highlights that these substances are both flammable and corrosive. The chemical reactions involved in the synthesis process release volatile solvents and gases, which can ignite easily, posing a fire risk. Additionally, these chemicals can cause severe chemical burns upon contact with skin or materials. The corrosive nature of these substances can damage the environment in which they are handled, as well as endanger anyone nearby.

The other options provide a contrast to the correct answer. Low toxicity is misleading due to the dangerous nature of the chemicals involved. Non-corrosive substances do not pose the same level of immediate harm upon exposure, which is inaccurate in this context. Finally, the claim that these substances emit no harmful fumes underplays the serious respiratory dangers posed by the toxic fumes released during their production. Thus, the correct identification of these substances as flammable and corrosive underscores the significant risks they entail in criminal investigations and public safety.