I buy these collapsible water bottles regularly to pack in my Operation Christmas Child shoeboxes. They take up.little room, and yet can be a truly valuable item for kids in difficult circumstances with questionable access to a clean, reliable water source. One young lady actually wrote to me to express her gratitude for the bottle. It and school supplies were her favorite gifts in the box. I generally wait for the bottles to go on sale and then stock up. I consider them affordable gifts with a big impact.