plastic insert pushed into a mug restricts wave motion and the tendency
for the liquid to spill.
Inserts are manufactured in food quality plastic and will withstand a 0-100C temperature range.
Inserts are easily removed for cleaning by hand or in a dishwasher and can be used over and over again.
Additives such as sugar and milk can be added and stirred before pushing the insert into the tumbler.
Each insert comes complete with a WHITE ceramic mug and stainless steel extractor and additional inserts can be purchased separately.