We're excited to bring you the new and improved Portion Perfection Snacker. Incorporating innovative GoStak technology, the set consists of four different sized compartments plus it now has a printed list of snacks that correspond to each container size. No more guess work if you can't find the list! It still comes with a handy guide for 100 Cal snacks that fit perfectly into each sized container. Just snap them all together and they'll go anywhere with you. Made of BPA free and phthalate free strong, safe, lightweight plastic.