Clear empty bottles and tubes to pack your essentials in without having to take the whole pesky container with more than you need with you. We use them to carry smaller amounts of insect repellent, polysporin, biodegradeable soap, toothpaste, etc...
 
Sizes
5ml tube - 2.2" x 0.67"
10ml tube - 3.3" x 1.4"
30ml spray bottle - 3.7" x 1.07" (called a 1-ounce bottle)
60ml spray bottle - 4.21" x 1.25" (called a 2-ounce bottle)