This should come as no surprise, but on top of being collapsible and portable, they're also 100% waterproof so they can be cleaned easily.
Brad's Deals Editor Michael,
This Panasonic Dental Water Flosser drops from $49.99 to $24.99 at Panasonic. Plus, the shipping is free, making this the lowest price we could find for one by $6. They're collapsible so they can be easily stored away and use a two-speed pulse that can reach places where normal dental floss can't. They've also received great reviews from over 2,500 Amazon Reviewers. Sales tax is charged in most states.