The unique dual-layered filter and lid are very special, offered without the tumbler. They will work great with your existing tumbler if you like to run things through the dishwasher after use. The V1 unit does not have EZ fill lines. We recommend pairing it with our scoop, which is sized perfectly for the filter.
Fitment on Other Brands:
The Mastermind Lid and Filter will fit on any 30 oz tumbler from YETI & Ozark Trail. It will fit older models of RTIC Tumblers. It will not fit on RTIC's newest design or BUILT branded tumblers.