In 2026, drinking beer on the Comal River in New Braunfels is legal, but it is strictly governed by the "Can Ban" ordinance designed to protect the waterway from litter. The most critical rule is that all disposable containers are prohibited; this means you cannot bring traditional beer cans, glass bottles, or plastic water bottles onto the water. To drink beer legally, you must transfer your beverage into a non-disposable, reusable container, such as a vacuum-insulated tumbler (like a Yeti), a thermos, or a high-quality sports bottle. Additionally, the city enforces a "volume drinking device" ban, which outlaws beer bongs and funnels. Coolers are permitted but must be no larger than 30 quarts and must feature a secure locking mechanism or zipper to prevent the contents from spilling if your tube flips. If you are caught with a single-use can or bottle, police and park rangers can issue citations with fines up to $500. For the best experience, prepare your reusable mugs at your car or rental shop before heading to the launch point at Prince Solms Park or Hinman Island.