Most likely, the manufacturer of your favorite insulated cup has placed the words "hand wash only" on the label or bottom of the cup itself and not "dishwasher safe." This means cleaning it with warm, soapy water in the sink and allowing it to dry is the only way to go.
Steel Cowgirl Etched Onyx 18 oz Insulated Mug - Dishwasher Safe!
Zenbo 40 oz tumbler with handle and straw,Keeps Drinks Cold up to
Premium Yet Affordable Sharpie Fine Felt Tip Pens - Assorted Ink - Shop Pens at H-E-B, fine tipped pens
Premium Yet Affordable Sharpie Fine Felt Tip Pens - Assorted Ink - Shop Pens at H-E-B, fine tipped pens
The Best Travel Coffee Mugs (2024) Tested and Reviewed
40 oz Tumbler with Handle and Straw Lid, 100% Leak-proof Travel
Custom Tumbler with Your Design! 20 or 30 oz Insulated Skinney, 24
Dishwasher Safe Travel Mug : Target
Box Clear Donation Storage Jar Suggestion Trading Lock Ballot Raffle Acrylic Money Ticket Container Tip Fundraising Collection - AliExpress
Travel Mugs, Dishwasher Safe Tumblers - Insulated Reusable Coffee Cups
Insulated Stainless Steel Tumbler Cups
Fast Free Shipping and Returns Last Call Stainless Steel Tervis Tumbler - Steve Diossy Marine Artist, dishwasher safe tumbler