Enjoy the same best selling Preserve Toothbrush whether you choose the Travel Case or Mail Back Pack. The Mail Back Pack is a revolutionary approach to packaging. The lightweight package doubles as a return envelope. Just pop your used Preserve toothbrush inside and send it back to us for recycling (our dentist friends recommend replacing your brush every three months!). You can also recycle it via our Gimme 5 program. Features Powered by recycled yogurt cups Handle 100% recycled #5 plastic; bristles new nylon Easy-to-grip curved handle Tiered bristles for gentle, thorough cleaning Completely recyclable after use Toothbrush replacement subscription service available BPA free Made in the USA Ingredients :N/A