Thank you so much for visiting our shop! Our tumblers are double wall insulated that will keep your drinks hot/cold for hours on end, making it perfect for any season. They come with a BPA-free clear sliding lock lid and a sealed reusable plastic straw. Our 20oz and 30oz regular tumblers are tall, skinny tumblers with a glossy finish. Our glow in the dark tumblers have a matte finish and glow blue, or green, whichever I have in stock at the time. Leaving your tumbler in the sun or under a light will "charge" your tumbler making it glow brightly in the dark. Our glitter tumblers have a more glitter textured feel to them and makes a tumbler come to life with sparkle!