Waste bag and assembly methods

1. A dumpster bag comprising:

a flexible bag member including a bottom and a sidewall structure extending upward from the bottom to a rim and having four sides, each having a rim portion of said rim and joined at four vertical corners;

four removable rim stays along the respective rim portions and each comprising a bungee pole assembly comprising an elastic member; and

four removable corner stays along the respective vertical corners and each comprising a plastic-pipe assembly that is free of an elastic member and comprises a plurality of pipe segments assembled end-to-end.

2. The bag of claim 1 wherein:

ends of each rim stays are received in sewn-in fabric pockets near the corners adjoining the adjacent sides, an intermediate portion of the rim stay passing through a sewn-in loop adjacent the rim of the associated side.

3. The bag of claim 1 wherein:

in each plastic-pipe assembly, the plurality of pipe segments are assembled end-to-end at associated joints; and

each of said joints comprises an end collar pre-fitted to one of the associated segments and dimensioned to receive a mating end of the other of the associated segments in an assembled condition and removable therefrom in a broken down shipping or storage condition.

4. The bag of claim 1 wherein:

the bungee pole assemblies each comprise a plurality of composite tubular segments and a plurality of ferrules for connecting adjacent segments.

5. The bag of claim 1 wherein:

the rim stays are under compression, placing adjacent material of the bag under tension across the length of the rim stays.

6. The bag of claim 1 wherein:

the bag comprises polyethylene and polypropylene fiber.

7. The bag of claim 1 having:

a height of 1-2 meters, a width of 1-4 meters, and a depth of 1-3 meters.

8. The bag of claim 1 having:

loops at each of four upper corners and four lower corners.

9. The bag of claim 1 wherein:

the bungee pole assemblies each comprise segments of less than 10 millimeter in diameter.

10. The bag of claim 1 wherein:

an interior and/or exterior of the bag member bears fill level indica.

11. The bag of claim 1 further comprising:

a plurality of lifting loops; and

an interior and/or exterior of the bag member bearing fill level indicia.

12. The bag of claim 11 wherein the plurality of lifting loops comprises:

loops at each of four upper corners and four lower corners.

13. The bag of claim 11 wherein:

there are at least said indicia for two different fill levels.

14. The bag of claim 11 wherein:

there are said indicia for two-four different fill levels.

15. The bag of claim 11 wherein:

the indicia comprise:

lines and/or arrows; and

numbers associated with the lines and/or arrows.

16. The bag of claim 11 wherein:

the indicia are painted or dyed.

17. The bag of claim 11 having a capacity of at least 4 cubic yards.

18. The bag of claim 11 wherein the bag material comprises a fabric.

19. The bag of claim 1 further comprising:

a plurality of lifting loops.