What is another word for coaster?
Pronunciation: [kˈə͡ʊstə] (IPA) 
Coaster is a word that often refers to a type of small mat, tray or disk used to place drinks on so as to avoid staining or damaging surfaces. While it is a commonly used term, there are various synonyms that can be alternately used in its place. Some of these synonyms include drink holder, drink coaster, beverage pad coaster, coaster pad, beverage coaster, drink mat, bottle coaster, cup coaster, mug coaster, and glass stand. These synonyms all refer to the same basic idea of a small, protective mat or tray that is used for drinks. So, depending on the context, these synonyms can be used interchangeably for coaster.
