Toners come in various textures, from as lightweight as water to thicker essences. You can also layer toner if you feel that the hydration provided by a single application is not enough (this is what the trendy 7 Skin Method is all about, for example).
At Yeppo, we recommend applying only exfoliating toners containing AHA/BHA/PHA acids with a cotton pad, while applying other toners directly to your palms and gently patting them onto your face. This way, you save your cotton pads and toner, while avoiding unnecessary physical exfoliation and possible irritation to your skin.