Taking shots sometimes requires a chaser, so the 'DoubleTake' drinking shot glasses are designed to pack it into the very glass that you're using to take the drink. The 'DoubleTake' shot glasses incorporate a two chamber design that makes them capable of holding a full shot along with a chaser to down afterward to alter the flavor.
The 'DoubleTake' shot glasses work by having the outer glass filled with your chaser and have the inner lining placed in and filled with the shot. The vent hole is then held when taking the shot and released afterward to release the chaser for a convenient drinking experience.
The 'DoubleTake' drinking shot glasses are ideal for using with shots and chasers but also work well for multi-level shots that have varying flavors to experience.