Water Bottles Chilly's, Under 50 Available here. Chilly's water bottles and thermal mugs are reusable and of premium quality, designed to keep drinks ice cold or warm for up to 24 hours. Excellent for everyday life, these reusable water bottles are a must for travelers, sports enthusiasts, schoolchildren, and walkers. If you love drinking your coffee while commuting, nothing is better than a Chilly's thermal mug to keep your coffee or tea warm. Stylish and highly compact, a reusable water bottle provides excellent cooling for drinks while being eco-friendly to help cut down on plastic consumption. Shop Chilly's thermal mugs and water bottles in Ireland.