If your question is about “what are people going to do with the DampRid tubs” after they’ve used up the crystals, the short answer is:

  • Refill reusable tubs with new DampRid crystals.
  • Empty the collected liquid into the toilet or sink.
  • Trash the empty plastic tub (or keep it as a container) rather than trying to reuse it for food or chemicals.

What DampRid tubs actually do

DampRid tubs are moisture absorbers. Inside are calcium chloride crystals that:

  • Pull water vapor from the air.
  • Gradually dissolve into a salty liquid (brine) that drips into the bottom chamber.

They’re commonly used in:

  • Basements
  • RVs and boats
  • Closets, bathrooms, laundry rooms, and other damp areas

What to do with the liquid

When the crystals are gone, the bottom of the tub is full of liquid. That liquid is:

  • Mostly calcium chloride solution (a saltwater brine).
  • Not dangerous in small amounts, but not ideal for plants or wildlife.

Recommended disposal:

  1. Pour the liquid into a toilet or sink and flush/drain it.
  1. It is described as septic-safe by the manufacturer.
  1. Do not pour large amounts directly onto garden soil or your lawn, especially if you’re unsure about the exact formulation (some scented versions have added oils/beads).

What to do with the empty tub

If it’s a refillable tub

Many DampRid tubs are designed to be reused:

  1. Remove the tray and empty the liquid into the toilet.
  1. Rinse the tray if you want (optional).
  2. Add new DampRid refill crystals according to the package instructions.
  1. Replace the lid and keep using it in the same damp spot.

In this case, you’re “going to” simply refill the tub and keep using it.

If it’s a disposable tub

Some DampRid products are single-use:

  • Once the crystals are gone, the whole unit is meant to be thrown in the trash.
  • The plastic tub itself is not food-safe and not intended for storing other chemicals or liquids.

If you like the shape, you can:

  • Keep the clean, dry tub as a generic storage container for non-food items (e.g., screws, craft supplies), but label it clearly so it’s not confused with food containers.
  • Or recycle it if your local program accepts that type of plastic.

What not to do with DampRid tubs

  • Don’t reuse them for food, water, or anything you’ll consume.
  • Don’t pour the brine directly onto plants or in sensitive garden areas unless heavily diluted and you know the product is plain calcium chloride.
  • Avoid tipping tubs over with liquid inside, especially on boats or in tight cabinets, as the liquid can be corrosive if it spills.

Summary of common options

Tub type| What to do with liquid| What to do with tub
---|---|---
Refillable| Empty into toilet/sink, flush| Refill with new crystals and keep using
Disposable| Empty into toilet/sink, flush| Discard in trash (or recycle if possible)

Information gathered from public forums or data available on the internet and portrayed here.