The Antithesis is represented by "Little bottle, big flavour" written in the bottom of the advertisement and according to McQuarrie, E.F. & Mick, D.G. (1996). it is the incorporation of binary opposites in a phrase (see appendix 2).
The Hyperbole is an exaggerated or extreme claim. The sentence "Beware the heat" is a reference to the spiciness of the Tabasco. It is so spicy that you can almost feel the heat.
The Metaphor