I use a folding/hanging toiletry kit from Eagle Creek (since discontinued). I also carry my own first aid kit in a small packing cube.

The key is replacing liquids with dry items as much as possible. You can repack your own into Nalgene bottles. REI also sells a lot of medications in individually-wrapped packets.

In my toiletry kit I carry:

• Folding toothbrush
• Tooth powder in a 10ml nalgene jar
• Floss
• Comb
• Razors
• Shave oil in a 10ml nalgene dropper
• Face cleanser in a 30ml nalgene bottle
• Deodorant
• Bar soap in a leak-proof soap container
• Spray bottle of glasses cleaning solution
• 5ml pouches of no-rinse laundry soap
• Gold bond powder
• Hand sanitizer
• Sunscreen face stick
• Tweezers
• Nail clippers
• Picaridin (insect repellant) wipes
• Pre-moistened face wipes
• Hand lotion
• Acne cream

My first aid kit:

• Acetaminophen
• Ibuprofen
• Thermometer
• Assortment of bandages
• Tegaderm film
• Pepto-bismal tablets
• Tums
• Alta Seltzer
• Imodium
• Neosporin cream in packets
• Hydrocortisone cream in packets
• Benadryl
• Zyrtec
• Sinus decongestant pills
• Alcohol wipes
• Antiseptic wipes
• Hand wipes
• N95 mask
• Q tips
• Throat lozenges
• Pair of latex gloves
• Disinfecting wipes
• Vial of table salt
• Emergen-C

The first aid kit is about the size of a paperback novel.