Camelbak bottles are made of BPA-free plastic, in bright and fun designs. The "better bottle" has a straw with a mouthpiece and valve that you need to bite down on to get any water, just like the Camelbak backpacks. It's a bit of a pain to clean, but the parts can come apart and go in the dishwasher. The straw and valve make it easy for kids or adults to drink lots of water on the go. The 0.75-liter is a great size for thirsty kids or adults. Note, Camelback does not recommend using the bottles for carbonated or acidic beverages.. Designer Brand: Camelbak.