Pack of 18 Avery Permanent Glue Sticks – Link 
Amazon has this currently marked down to only $2.40!
Note that this is an Add-on Item, which ships with a $25 Amazon order.
- Ideal for paper, cardboard and photos
- Washes out of clothing for easy cleaning
- Photo-safe formula is acid free to protect important materials
- Includes eighteen Glue Stics