CAN I USE TRAVEL TUMBLER WITHOUT THE SIP & GO LID? 15 January 2020 13:39 Updated Follow Yes, the rim of the Travel Tumbler is smooth, designed for a comfortable drinking experience even without the Sip & Go Lid. Related articles CAN I FILL TRAVEL TUMBLER WITH ICE? DO I NEED TO USE SPECIAL CAUTION WHEN USING TRAVEL TUMBLER? CAN I USE TRAVEL TUMBLER WITH REUSABLE STRAWS? HOW CAN I CLEAN MY SIP&GO LID? CAN TRAVEL TUMBLER GO IN THE FREEZER?