Lily's Home Double Wall Gel-Filled Acrylic Freezer Mason Jar Mugs with Lids and Straws, Great as Old Fashion Drinking Glasses at BBQs and Parties, Assorted Colors (18 oz. Each, Set of 4) KEEP YOUR DRINKS COLD AND REFRESHING: Each of the 4 mugs is constructed with double-walled insulation filled with crackle gel that can go in the freezer and keep your drink extra cold while you enjoy it! FROSTY AND ENJOYABLE: The unique gel creates a frosty appearance between your beverage and the mug. A set includes one each: blue, red, orange, and green so everyone has their own color. Clear plastic lids and reusable straws are included. You can use with or without the lids and straw. FREEZE AND REFREEZE: Hand wash and refreeze for four hours so you always have frosty mugs. Mugs hold up to 18 ounces of liquid and made of a BPA-free acrylic material, so they are safe to use for just about any beverage. Pour your favorite beer in one of these and enjoy! They are also perfect for root beer floats, iced coffee, or even just plain water. CHILL DRINKS WITHOUT WATERING THEM DOWN: Serve any beverage in these freezable mugs for an instant ice-cold chill. You don't have to worry about traditional ice cubes melting and watering down your drink before you finish it. Yuck! The freezer gel is safely between the double walls of the mug, so it never touches your drink, yet still keeps it cold. A GREAT GIFT IDEA: Lily's Home makes a wide array of products for every home and garden lover. Whether you're looking for a perfect gift to spruce up your friend's garden, or if you need a housewarming present, Lily's Home has something for everyone!