Pair of goggles.
Pouch of tobacco+papers
lighter
Packet containing a pair of unused gas mask filters.
Graphite-500 micron thick foil
Chemically-resistant bottle (empty)
Another of the same bottles, containing iodine monochloride (no I didn't intend on keeping it in my pockets long, only long enough to move it from the lab to where I'll be extracting the remainder of that synthesis from the column)
Pocket knife, one with a curved tip, and lock-back blade, no accessories, just one sturdy hunting knife-like blade and a little catch on it that disengages the lock and can be pressed inwards whilst closed to instantly extend the blade with a flick of the wrist, locking automatically once the blade whips out and aligns with the lock mechanism.
Can of pepsi max
Gas mask
Pair of elbow length gloves
Various lengths and widths of flexible tubing
For some reason, a little cylindrical lump of sulfur
Various meds, muscle relaxers, morphine shot, cimetidine (for stomach issues)
Roll of teflon tape
Portable argon gas cylinder, face shield tucked over the top
Candy, various sorts (quite indispensable:P)
Can of naphtha
Tube of dow-corning high vacuum grease.