Call them Stash Notes or Cache Notes, they are recommended to have in a cache to not only identify what it is but to explain how the game is played. We all know that it's a good idea to place them with your hides but if they are paper they get tatty and torn really quickly.

These ones are UV printed on 220gsm light cardstock and laminated for a long life. They are double sided and contain all the "standard" cache notes.

Measuring  approx 9cm by 6.5cm they ideal for those 200ml food container type hides.