The lids where the straw is centered is such a “tight fit” that it create a suction nightmare. It’s very hard to actually drink from the straw. I had to cut the rubber “flaps” to provide a small amount of air flow. Understand you’re trying to make them “leak proof” but these are really hard to drink from. I also find I’ve gotta turn the mega mug to the side to drink from it when not completely upright and standing over the cup. (This may be a bad explanation). Anywho, I’m glad we can purchase the original “slide lids” to use on the mugs. Please don’t stop designing the mugs so we can interchange to the best lid fit for us. (It’d be really great if we got to pick which lid style we wanted with each purchase). SWIG is my fav mug. I have over 20 of them in various sizes, styles, prints. The mega mug is my all time fav and I don’t want them to change.
*pic is of the lid that works best for me! (& to show I’m literally drinking from a SWIG right now!!)