What's In Your Bag?

What do you have in your knapsack when you travel to teach a workshop? My list is:

• cough drops
• spare t-shirt (and deodorant)
• a variety of video adapters
• spare power adapter
• laptop stickers
• toothbrush (or mouthwash, or something of similar utility)
• granola bar (or some other snack)
• my daughter's latest art project
• Eno (or other antacid, because road food)
• sticky notes
• business cards

Other people at this week's instructor training session added:

• a printed copy of notes (for reference during teaching)
• insulated cup for tea/coffee
• spare glasses/contacts
• paper (notebook) and pen
• a Chromecast for streaming
• some sort of WiFi hub (in case networking in the room isn't working)

What else do you take, and why?