Whether you enjoy backpacking or just subscribe to the one bag travel philosophy, a lot of little items can quickly add to up a lot of weight to carry around. Save weight and bulk by drying toothpaste into toothpaste dots for use while on the go.
Tactical skills weblog Imminent Threat Solutions shares a simple method for making toothpaste dots by squeezing small, chocolate-chip sized "dots" of toothpaste onto aluminium foil, allowing those dots to harden for a week or so, and then transferring to a small waterproof bag. To use, all you need to do is pop a toothpaste dot in your mouth, chew for a few seconds, and start brushing. Two caveats: this technique doesn't work with gel toothpaste (check out the source link for photos) and you'll want to toss a pinch of baking soda in your storage bag to keep the dots from sticking.
In addition to backpacking and travelling, I can see this also being a good thing to keep in your go bag with one of those small travel toothbrushes for times you'd like to brush your teeth at the office or on the go.
Trimming Weight with Toothpaste Dots for Lightweight Backpacking [Imminent Threat Solutions]