Are straw lids or spout lids better for school?

Parent communities on Reddit are split. Straw lids (Thermos Funtainer, Owala Kids, Simple Modern) are easier for younger kids who can't tip a bottle reliably, but reviewers flag that straws mold faster and need replacement. Spout/chug lids (like the Thermos 16 oz wide-spout) are easier to clean and last longer but require a kid who can drink without spilling.