Absorbent coaster usable as insert for drink holders

Abstract

An absorbent insert for drink holders such as coasters and cup holders in vehicles has a size and shape to be retained within the drink holder. Most often, the insert will be a circle having a 2 ¾ inch diameter. The insert is placed within the drink holder. The insert is made of absorbent cellulose material, such as sold by 3M under the name Cellulose Sponge F11, F12, F13. The cellulose absorbs condensation and any additional liquid, such as from spills. Initially, the insert is {fraction (1/16)}th of an inch but expands upon absorbing fluids. When fully saturated, the insert expands to ½ inch thickness. The increase in thickness is an indicator that the insert should be replaced. The insert is an inexpensive, effective method of absorbing spills and maintaining a clean drink holder.

1 . A method for protecting cup holders, comprising 
 placing an absorbent insert at the bottom of the cup holder,    retaining a container in said cup holder, and    replacing said absorbent insert when said insert provides visual indication of being fully saturated.    
   
   
       2 . The method of  claim 1 , wherein 
 said visual indication is an increase in thickness of said insert.    
   
   
       3 . The method of  claim 1 , wherein said cup holder is in a vehicle.  
   
   
       4 . The method of  claim 1 , further comprising forming said insert from cellulose sponge.