Originally Posted by
oldpenny16
I use Tide either liquid or powder depending on where I am going. I don't do powder internationally.

How come?
In our office we also have a heat sealing machine used to seal items for shipment. I often make up little packets of liquid Tide into strips for traveling. About 1/2 ounch of Tide in each pouch works fine. I put those into my checked bag.
^ We use our Foodsaver machine to do the same thing.
Originally Posted by
SamMarkand
Beware using the shampoos with conditioners or added ingredients in sink laundry, because sometimes the moisturizers can stain your clothing.
Well I learned something today.
I know OP wanted tips for sink washing, but for machine washing, there's a new Purex product out. The "
Complete 3-in-1 Laundry Sheets" combine detergent, fabric softener and anti-static ^ treatment into one laundry sheet.
How Does It Work?
Simply drop laundry sheet into washer, the detergent is released during the wash cycle. Once wash is complete, transfer the laundry sheet with clothes to dryer. The stripe is heat activated by the dryer to soften and remove static. It’s that simple.
These could lighten the load for long trips and keep me from having to buy those $2 little boxes of Tide from the hotel (much more when you're on a cruise ship).