I have this Scepter water can which looks similar to the Igloo version.

Scepter Water Can (5-Gallon) https://www.amazon.com/dp/B000MTI0GA/ref=cm_sw_r_cp_api_glt_i_39T3S355M73250NM6415

This dispenser worked well with the included yellow o-ring.

https://www.amazon.com/dp/B07Y9RVHDM/ref=cm_sw_r_cp_api_glt_i_69EAVVTAR2E1WYPGXMZX?psc=1

This one doesn’t fit as snug on the water can but has better water pressure.

https://www.amazon.com/dp/B014269XKA/ref=cm_sw_r_cp_api_glt_i_6ZVH7M3QCSVAR4SFS6H8