The replacement lids is perfectly compatible with the Stanley Adventure 40 OZ Cup. Please double check the size 40oz replacement lids are made by ABS material which can use in dishwasher, BPA free, safely applied in your cup. Lid are made of high quality food grade and white clear PP material, durable and easy to clean. 40oz lid inner diameter 10cm/3.93in 40 OZ Tumbler Lid Replacement Fit for Stanley Cup, 2 Pack Replacement Lids Fit for Stanley Travel Tumbler, Tumbler Covers for Stanley Cup Accessories Dishwasher Safe