Aquarium Chiller 75gal 1/3 HP Fish Tank Chiller Special Quiet Design Refrigeration Compressor for hydroponics (75gal/300L)

If you don't want to make ice, you can purchase a chiller. This chiller should cool your bath to below 60 degrees, though it will depend on how much water, ambient air temp, and starting water temp.

Timer

Having a timer is helpful for keeping track of how long you are in the ice bath.

US+ Food Grade 3% Hydrogen Peroxide - Versatile All-Natural Cleaner - Made in USA - 1 Gallon (128 Fl Oz)

Keep your bath clean with hydrogen peroxide.

CASA LINGO Pantry Organization and Storage, Pasta Containers for Pantry Kitchen, Set of 4 Plastic Airtight Food Storage Containers with Lid for Bulk Food Dry Food Cereal 4L

Use these plastic bins to make ice bricks. They are water tight. It makes it easy to carry without making a mess.

DEKOPRO Submersible Water Pump 1/3 HP 2450GPH Utility Pump Thermoplastic Electric Portable Transfer Water Pump with 10-Foot Cord for Pool Tub Garden Pond Draining

Empty the bath quickly and water the plants easily.

Women's Robe

This is great for before and after the bath. Nice and cozy.

Rubbermaid 100 Gallon Stock Tank

100 Gallon is perfect for comfortably fitting your whole body.

Tavaleu Pool Skimmer - Pool Skimmer Net, Professional Pool Nets for Cleaning, Swimming Pool Leaf Skimmer Net with Reinforced Frame,Ultra Fine Mesh Netting, Clean Remove The Finest Debris Fast

Keep your bath clean with this skimmer.

Waterproof Stock Tank Cover for 100 Gallon Stock Tank Oval

Suitable for Outdoor Use, Protect Your Stock Tank

Camco TastePURE Camper/RV Water Filter & Hose Protector | Inline Water Filter Reduces Bad Taste, Odor, Chlorine & Sediment | Ideal for RVs, Campers, Travel Trailers, Boats | Made in the USA

Make sure your bath water is filtered.

Wireless Thermometer

Keep track of the temperature of your ice bath easily. No need to go outside and check. Just keep the receiver inside and always know the temperature.

Polar Recovery Tub/Portable Ice Bath for Cold Water Therapy Training/Cold Plunge tub for Athletes - Adult Spa for Ice Baths and Soaking

If you don't have space for an outdoor tub, this should work great for you.