HELP I've Created a Monster 20oz Tumbler and Matching Monster 12oz Sippy cup Tumbler set.
Sippy cup lid screws onto Tumbler, also comes with clear screw on slide lid to convert Sippy Tumbler into 12oz Tumbler.
Both Tumblers are double walled insulated stainless-steel Tumblers. Will keep drink cold for many hours. Both come with Slide Lids, so when not in use can close lid.
Both come with reusable straw and Non-Stick bottoms.
