Shimmer Jar
A solid container of Shimmer.
Items that land on top of it get 
. (See Shimmer for more details on transmutations.)
Recipe: Shimmer Shell at the bottom, Glass in the middle, and a Glass Bottle on top.
Spilling
It can break very easily! In which case, it will spill liquid Shimmer.
It spills when broken without Silk Touch, broken outside of Creative mode, and when it lands from a fall (it's influenced by gravity.).
As an unfortunate side-effect of this behavior, Shimmer Jars placed by any means other than a player spontaneously combust as soon as they're placed. Including commands.