Review on Rainbow Metal Straws 4 Pack with Carry Case Bag and Silicone Tips - Reusable Boba Smoothie Straw, Wide Thick Fat Angled Tip Straw for Milkshake, Jumbo Bubble Tea Straws with Brush - 12mm (0.5in) by Marshall Dickinson

Works great, everyone loves it. You can put the silicone sleeve on top to protect your lips/teeth, lower to protect the side of the mug, or on the bottom if you are using a metal mug and don't want the feel of a metal straw on a metal mug. If I don't have a drink with me, I don't use the case at all. It's 8.5 inches, which is a great length for a regular sized glass like a pint glass or this milkshake glass. Many sellers sell the 10 inch version which is too long. I didn't notice an unpleasant aftertaste from either the metal or the silicone case. Can buy more to collect Boba care theme packs for friends!