WHAT’S IN THIS SET?: Thought you’d never ask. It has 4 sizes. The largest holds 21oz which I like because I eat like an animal. The 2nd largest holds 13oz which I often pack with my 21oz container. Please don’t judge me. The 3rd holds 7oz and is perfect for snacks. The smallest holds 1.5oz. It’s perfect for condiments and salad dressing. It’s also a perfect size for doing shots with your buddies after work. But it wasn’t meant for that. But it works really well for that. WAIT, THERE ARE DIFFERENT TYPES OF SILICONE?: Yup. We didn’t know this either until we started manufacturing our silicone lids. Unfortunately, a lot of silicone has “filler” mixed in with the silicone because it’s a lot cheaper to make. We only use 100% Pure LFGB Silicone (the highest quality available) and we don’t “cut it’ with any fillers. 100% LEAKPROOF AND EASY TO OPEN (YES, FINALLY!): Easier said than done. It only took us 4 months to create a custom silicone mold that’s easy enough for a child to open.