These 20 mm pop-ups are flavor matched to the C-4-U boilies and contain NHDC. They'll float high all day long. For shy biting fish, try a neutral bouyancy, split rig with 1/2 a pop-up and 1/2 a matching boilie. For even more attraction, dip in the C-4-U Super Slimy.  Packed in a resealable screw top jar.