Field note 10
Daily bottles with published volumes and insulation claims from the maker.
Method on this page. Shortlist by stated capacity and insulation hours when the brand prints them. No sip tests.
Hydration on the road is volume plus whether the bottle is empty at security. We log Hydro Flask’s 32 oz Standard Mouth, YETI Rambler 26 oz, and the Nalgene 32 oz Wide Mouth — all with long-lived official spec pages.
Insulation “up to X hours” is the maker’s claim. We repeat it with a source. We do not run ice tests in this directory.
Current 32 oz (946 ml) catalog SKU is Wide Mouth. Hydro Flask publishes TempShield hours on hydroflask.com. A 32 oz Standard Mouth is no longer listed.
Tritan 32 oz Wide Mouth. Nalgene publishes volume, Tritan material, and dishwasher/leak claims on nalgene.com.
24 oz Wide Mouth — official smaller daily size with the same TempShield claim family.
26 oz Rambler bottle. YETI publishes stainless construction and Chug/cap options on yeti.com.