Find them at: https://k9nwsource.com/shop/magnetic-bullet-tube-2/
These tiny MAGNETIC single Q-Tip Hide Containers / Scent Vessels are incredibly useful and FUN to use. 6 Color choices and sets are available.
Use a single Bullet Tube for pinpoint hide applications. Gang them up to provide more access to odor. Use the head of a black Q-Tip for the ultimate in stealth hides.