Yes! I use the totes as mini green houses in my green house!
I hadn't thought of using the lids as water trays... hmmmm!
Yes. The Hefty tote lids are great as water trays. I use the lids for my starts on my starting shelf under lights, and then later they get used as the bottom of the mini greenhouse when I take them outside. It really works great for me. Again, not all clear plastic totes are the same and many of the other tote lids are not reinforced nor flat, making them unusable for bottom watering.

For many years, I used the standard 10X20 trays and domes...
When brand new, the trays work fine if you only leave them on the shelf. But if you want to move them around, like maybe outside for some sunshine, that plastic is just not very strong and cracks. When the water tray cracks, I cannot use it anymore inside the house on my seed starting shelf. I was only getting about one year's use out of the trays.
The domes are good only for a few weeks, and then the plants outgrow them. In my case, I just did not use them outside at all because my plants were too tall for the domes by the time I could set them out on the deck.
Anyways, a few years ago, I had five 10X20 trays and only one was not cracked and leaking. So, I either had to buy new 10X20 trays or some other system. That's when I found out using the Hefty Storage Totes as mini greenhouses and the lids as water trays.
I have used those Hefty totes for 3 years now and they are still as good as new. They should probably last me my lifetime. I had to invest a little money upfront on the purchase of the totes, but it only took a couple years to break even on that investment. Now, it's like having free water trays and domes every year. I certainly have saved money by using those tote lids as water trays and the tote bin as a mini greenhouse.

If I had a proper greenhouse and just left the trays on the shelf all the time, maybe the 10X20 trays would have worked out better for me. But since I move my trays around, in and out of the house, they just did not stand up and broke. My 10X20 trays only lasted about one year.
I did like the accessories like all those 4- and 6-pack starter pot sets that fit into the 10X20 trays, but I am using those larger 3" net pots now and they fill up the 10X20 trays too fast. Also, they get too heavy to move around in the 10X20 trays. So, the Hefty tote lid is much better for my needs. And I can still use those 4- and 6-pack starter pot sets in the Hefty tote if I want.
Also, the Hefty totes have those latches on the side to lock the lid to the tote. You can easily carry the entire mini greenhouse as one unit. Also, you can stack them one on top of the other both inside and outside if you want. You just can't do that with the 10X20 trays and domes I used to use years ago.


I have saved a lot of money by investing in those Hefty clear storage "mini greenhouse" totes compared to buying new 10X20 trays every year. So, I guess that is being frugal. Certainly, growing some of your own food is sustainable. Well, I just enjoy it.

Well, I had a really good crop of food last year that was very much appreciated by our local deer...
(Google picture for reenactment)
I think I lost maybe 70% of my harvest last year to a herd of deer that visited in the night. First time ever they found my garden, but they took everything they could.
At the end of last summer, I made wire cages for almost all my raised garden beds. So, this year I hope to actually harvest most of my efforts!
(Similar to what I built for each raised bed).
We have about a foot of snow out in the yard, and already I am seeing deer tracks up and around my raised garden beds. Those deer are going to be disappointed this year when they see all those tomatoes behind the chicken wire cages!